diff --git a/packages/logger/src/ILoggerFactory.ts b/packages/logger/src/ILoggerFactory.ts
deleted file mode 100644
index d02f43e..0000000
--- a/packages/logger/src/ILoggerFactory.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import {ILogger} from './logger/ILogger'
-
-export interface ILoggerFactory {
-  getLogger(name: string): ILogger
-}
diff --git a/packages/logger/src/LogLevel.ts b/packages/logger/src/LogLevel.ts
index ac0b3e9..02dda1f 100644
--- a/packages/logger/src/LogLevel.ts
+++ b/packages/logger/src/LogLevel.ts
@@ -8,5 +8,6 @@ export enum LogLevel {
 }
 
 export function isLogLevel(value: string): value is keyof typeof LogLevel {
-  return LogLevel.hasOwnProperty(value) && isNaN(Number(value))
+  return Object.prototype.hasOwnProperty
+  .call(LogLevel, value) && isNaN(Number(value))
 }
diff --git a/packages/logger/src/LoggerFactory.ts b/packages/logger/src/LoggerFactory.ts
index 14f6d63..5c40ff1 100644
--- a/packages/logger/src/LoggerFactory.ts
+++ b/packages/logger/src/LoggerFactory.ts
@@ -1,66 +1,5 @@
-import { MessageFormatter } from './formatters'
-import { getDefaultParams } from './getDefaultParams'
-import { ILoggerFactory } from './ILoggerFactory'
-import { ILogger, Logger } from './logger'
-import { isLogLevel, LogLevel } from './LogLevel'
-import { ConsoleTransport } from './transports'
+import {Logger} from './logger/Logger'
 
-// logging can be configured via environment variables, for example:
-// `LOG='*:info,api:debug,-sql' node ...` sets all logs to info, api to debug,
-// and disable all sql logs.
-
-export interface IEnabledLoggers {
-  readonly [key: string]: LogLevel
-}
-
-export interface ILoggerOptions {
-  readonly enabledLoggers: IEnabledLoggers
-}
-
-export class LoggerFactory implements ILoggerFactory {
-
-  protected readonly defaultLogLevel: LogLevel
-  protected readonly loggers: {[key: string]: ILogger} = {}
-  getCorrelationId: () => string = () => ''
-
-  static init({
-    logs = getDefaultParams(),
-  } = {}) {
-    const enabledLoggers = logs.split(',').reduce((logConfig, log) => {
-      const [key, value] = log.split(':')
-      const level = value && value.toUpperCase()
-      logConfig[key] = isLogLevel(level) ? LogLevel[level] : LogLevel.INFO
-      return logConfig
-    }, {} as {[key: string]: LogLevel})
-
-    return new this({enabledLoggers})
-  }
-
-  constructor(readonly options: ILoggerOptions) {
-    this.defaultLogLevel = options.enabledLoggers['*'] || LogLevel.OFF
-  }
-
-  getLoggerLevel(name: string): LogLevel {
-    const {enabledLoggers} = this.options
-    const disabled = !!enabledLoggers['-' + name]
-    if (disabled) {
-      return LogLevel.OFF
-    }
-    return enabledLoggers[name] || this.defaultLogLevel
-  }
-
-  getLogger = (name: string): ILogger => {
-    if (this.loggers[name]) {
-      return this.loggers[name]
-    }
-
-    const level = this.getLoggerLevel(name)
-    const logger = this.loggers[name] = new Logger({
-      name,
-      formatters: [new MessageFormatter()],
-      transports: [new ConsoleTransport(level)],
-    })
-
-    return logger
-  }
+export interface LoggerFactory {
+  getLogger(name: string): Logger
 }
diff --git a/packages/logger/src/IMessage.ts b/packages/logger/src/Message.ts
similarity index 71%
rename from packages/logger/src/IMessage.ts
rename to packages/logger/src/Message.ts
index 8fdeb06..abd5655 100644
--- a/packages/logger/src/IMessage.ts
+++ b/packages/logger/src/Message.ts
@@ -1,9 +1,9 @@
 import { LogLevel } from './LogLevel'
 
-export interface IMessage {
+export interface Message {
   loggerName: string
   level: LogLevel
   timestamp: Date
   message: string
-  params: any[]
+  params: unknown[]
 }
diff --git a/packages/logger/src/LoggerFactory.test.ts b/packages/logger/src/SimpleLoggerFactory.test.ts
similarity index 85%
rename from packages/logger/src/LoggerFactory.test.ts
rename to packages/logger/src/SimpleLoggerFactory.test.ts
index a361805..779be0f 100644
--- a/packages/logger/src/LoggerFactory.test.ts
+++ b/packages/logger/src/SimpleLoggerFactory.test.ts
@@ -1,11 +1,12 @@
 import stdMocks from 'std-mocks'
-import loggerFactory, { LoggerFactory } from './'
+import loggerFactory from './'
+import { SimpleLoggerFactory } from './SimpleLoggerFactory'
 
-describe('LoggerFactory', () => {
+describe('SimpleLoggerFactory', () => {
 
-  let getLogger: typeof LoggerFactory.prototype.getLogger
+  let getLogger: typeof SimpleLoggerFactory.prototype.getLogger
   beforeEach(() => {
-    getLogger = LoggerFactory.init({
+    getLogger = SimpleLoggerFactory.init({
       logs: 'test1:verbose,-test3,t4,logtest5',
     })
     .getLogger
@@ -73,10 +74,10 @@ describe('LoggerFactory', () => {
 
   describe('create', () => {
     it('creates a logger with defaults', () => {
-      LoggerFactory.init()
+      SimpleLoggerFactory.init()
     })
     it('logs all', () => {
-      const l = LoggerFactory.init({ logs: '*' }).getLogger('test')
+      const l = SimpleLoggerFactory.init({ logs: '*' }).getLogger('test')
       l.info('test info')
       l.debug('test debug')
       expect((global.console.debug as any).mock.calls).toEqual([])
diff --git a/packages/logger/src/SimpleLoggerFactory.ts b/packages/logger/src/SimpleLoggerFactory.ts
new file mode 100644
index 0000000..38968d1
--- /dev/null
+++ b/packages/logger/src/SimpleLoggerFactory.ts
@@ -0,0 +1,66 @@
+import { MessageFormatter } from './formatters'
+import { getDefaultParams } from './getDefaultParams'
+import { LoggerFactory } from './LoggerFactory'
+import { SimpleLogger, Logger } from './logger'
+import { isLogLevel, LogLevel } from './LogLevel'
+import { ConsoleTransport } from './transports'
+
+// logging can be configured via environment variables, for example:
+// `LOG='*:info,api:debug,-sql' node ...` sets all logs to info, api to debug,
+// and disable all sql logs.
+
+export interface EnabledLoggers {
+  readonly [key: string]: LogLevel
+}
+
+export interface LoggerOptions {
+  readonly enabledLoggers: EnabledLoggers
+}
+
+export class SimpleLoggerFactory implements LoggerFactory {
+
+  protected readonly defaultLogLevel: LogLevel
+  protected readonly loggers: {[key: string]: Logger} = {}
+  getCorrelationId: () => string = () => ''
+
+  static init({
+    logs = getDefaultParams(),
+  } = {}) {
+    const enabledLoggers = logs.split(',').reduce((logConfig, log) => {
+      const [key, value] = log.split(':')
+      const level = value && value.toUpperCase()
+      logConfig[key] = isLogLevel(level) ? LogLevel[level] : LogLevel.INFO
+      return logConfig
+    }, {} as {[key: string]: LogLevel})
+
+    return new this({enabledLoggers})
+  }
+
+  constructor(readonly options: LoggerOptions) {
+    this.defaultLogLevel = options.enabledLoggers['*'] || LogLevel.OFF
+  }
+
+  getLoggerLevel(name: string): LogLevel {
+    const {enabledLoggers} = this.options
+    const disabled = !!enabledLoggers['-' + name]
+    if (disabled) {
+      return LogLevel.OFF
+    }
+    return enabledLoggers[name] || this.defaultLogLevel
+  }
+
+  getLogger = (name: string): Logger => {
+    if (this.loggers[name]) {
+      return this.loggers[name]
+    }
+
+    const level = this.getLoggerLevel(name)
+    const logger = this.loggers[name] = new SimpleLogger({
+      name,
+      formatters: [new MessageFormatter()],
+      transports: [new ConsoleTransport(level)],
+    })
+
+    return logger
+  }
+}
diff --git a/packages/logger/src/formatters/Formatter.ts b/packages/logger/src/formatters/Formatter.ts
new file mode 100644
index 0000000..3a06f42
--- /dev/null
+++ b/packages/logger/src/formatters/Formatter.ts
@@ -0,0 +1,5 @@
+import { Message } from '../Message'
+
+export interface Formatter {
+  format(message: Message): Message
+}
diff --git a/packages/logger/src/formatters/IFormatter.ts b/packages/logger/src/formatters/IFormatter.ts
deleted file mode 100644
index 25e34f4..0000000
--- a/packages/logger/src/formatters/IFormatter.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { IMessage } from '../IMessage'
-
-export interface IFormatter {
-  format(message: IMessage): IMessage
-}
diff --git a/packages/logger/src/formatters/MessageFormatter.ts b/packages/logger/src/formatters/MessageFormatter.ts
index 8492fd8..b775240 100644
--- a/packages/logger/src/formatters/MessageFormatter.ts
+++ b/packages/logger/src/formatters/MessageFormatter.ts
@@ -1,5 +1,5 @@
-import { IFormatter } from './IFormatter'
-import { IMessage } from '../IMessage'
+import { Formatter } from './Formatter'
+import { Message } from '../Message'
 import { LogLevel } from '../LogLevel'
 import { format } from 'util'
 
@@ -13,8 +13,8 @@ function padleft(str: string, len: number) {
   return str
 }
 
-export class MessageFormatter implements IFormatter {
-  format(message: IMessage) {
+export class MessageFormatter implements Formatter {
+  format(message: Message) {
     message.message = format(
       '%s %s %s',
       message.loggerName,
diff --git a/packages/logger/src/formatters/index.ts b/packages/logger/src/formatters/index.ts
index a06ed59..e78282e 100644
--- a/packages/logger/src/formatters/index.ts
+++ b/packages/logger/src/formatters/index.ts
@@ -1,2 +1,2 @@
-export * from './IFormatter'
+export * from './Formatter'
 export * from './MessageFormatter'
diff --git a/packages/logger/src/index.ts b/packages/logger/src/index.ts
index 2bdb2a0..5e2b511 100644
--- a/packages/logger/src/index.ts
+++ b/packages/logger/src/index.ts
@@ -1,11 +1,11 @@
-export * from './ILoggerFactory'
-export * from './IMessage'
+export * from './LoggerFactory'
+export * from './Message'
 export * from './LogLevel'
 export * from './Logger'
 export * from './LoggerFactory'
 
-import {LoggerFactory} from './LoggerFactory'
-export default LoggerFactory.init()
+import {SimpleLoggerFactory} from './SimpleLoggerFactory'
+export default SimpleLoggerFactory.init()
 
 import * as transports from './transports'
 export {transports}
diff --git a/packages/logger/src/logger/ILogger.ts b/packages/logger/src/logger/ILogger.ts
deleted file mode 100644
index 132b1a6..0000000
--- a/packages/logger/src/logger/ILogger.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-type ILogFunction = (message: string, ...meta: any[]) => void
-
-export interface ILogger {
-  error: ILogFunction
-  warn: ILogFunction
-  info: ILogFunction
-  debug: ILogFunction
-  verbose: ILogFunction
-}
diff --git a/packages/logger/src/logger/Logger.ts b/packages/logger/src/logger/Logger.ts
index 85656ef..65f4375 100644
--- a/packages/logger/src/logger/Logger.ts
+++ b/packages/logger/src/logger/Logger.ts
@@ -1,51 +1,9 @@
-import { IFormatter } from '../formatters'
-import { IMessage } from '../IMessage'
-import { LogLevel } from '../LogLevel'
-import { ITransport } from '../transports'
-import { ILogger } from './ILogger'
+type ILogFunction = (message: string, ...meta: unknown[]) => void
 
-interface ILoggerParams {
-  name: string
-  readonly formatters: readonly IFormatter[],
-  readonly transports: readonly ITransport[],
-}
-
-export class Logger implements ILogger {
-  constructor(protected readonly config: ILoggerParams) {}
-
-  protected log(level: LogLevel, message: string, params: any[]) {
-    const initialMessage: IMessage = {
-      loggerName: this.config.name,
-      timestamp: new Date(),
-      message,
-      params,
-      level,
-    }
-    const formattedMessage = this.config.formatters.reduce((m, f) => {
-      return f.format(m)
-    }, initialMessage)
-
-    this.config.transports.forEach(t => {
-      if (formattedMessage.level <= t.level) {
-        t.write(formattedMessage)
-      }
-    })
-  }
-
-  error(message: string, ...args: any[]) {
-    this.log(LogLevel.ERROR, message, args)
-  }
-  warn(message: string, ...args: any[]) {
-    this.log(LogLevel.WARN, message, args)
-
-  }
-  info(message: string, ...args: any[]) {
-    this.log(LogLevel.INFO, message, args)
-  }
-  debug(message: string, ...args: any[]) {
-    this.log(LogLevel.DEBUG, message, args)
-  }
-  verbose(message: string, ...args: any[]) {
-    this.log(LogLevel.VERBOSE, message, args)
-  }
+export interface Logger {
+  error: ILogFunction
+  warn: ILogFunction
+  info: ILogFunction
+  debug: ILogFunction
+  verbose: ILogFunction
 }
diff --git a/packages/logger/src/logger/SimpleLogger.ts b/packages/logger/src/logger/SimpleLogger.ts
new file mode 100644
index 0000000..d0fd556
--- /dev/null
+++ b/packages/logger/src/logger/SimpleLogger.ts
@@ -0,0 +1,50 @@
+import { Formatter } from '../formatters'
+import { Message } from '../Message'
+import { LogLevel } from '../LogLevel'
+import { Transport } from '../transports'
+import { Logger } from './Logger'
+
+interface LoggerParams {
+  name: string
+  readonly formatters: readonly Formatter[]
+  readonly transports: readonly Transport[]
+}
+
+export class SimpleLogger implements Logger {
+  constructor(protected readonly config: LoggerParams) {}
+
+  protected log(level: LogLevel, message: string, params: unknown[]) {
+    const initialMessage: Message = {
+      loggerName: this.config.name,
+      timestamp: new Date(),
+      message,
+      params,
+      level,
+    }
+    const formattedMessage = this.config.formatters.reduce((m, f) => {
+      return f.format(m)
+    }, initialMessage)
+
+    this.config.transports.forEach(t => {
+      if (formattedMessage.level <= t.level) {
+        t.write(formattedMessage)
+      }
+    })
+  }
+
+  error(message: string, ...args: unknown[]) {
+    this.log(LogLevel.ERROR, message, args)
+  }
+  warn(message: string, ...args: unknown[]) {
+    this.log(LogLevel.WARN, message, args)
+  }
+  info(message: string, ...args: unknown[]) {
+    this.log(LogLevel.INFO, message, args)
+  }
+  debug(message: string, ...args: unknown[]) {
+    this.log(LogLevel.DEBUG, message, args)
+  }
+  verbose(message: string, ...args: unknown[]) {
+    this.log(LogLevel.VERBOSE, message, args)
+  }
+}
diff --git a/packages/logger/src/logger/index.ts b/packages/logger/src/logger/index.ts
index 625f6ac..0fff30e 100644
--- a/packages/logger/src/logger/index.ts
+++ b/packages/logger/src/logger/index.ts
@@ -1,2 +1,2 @@
-export * from './ILogger'
 export * from './Logger'
+export * from './SimpleLogger'
diff --git a/packages/logger/src/transports/ConsoleTransport.ts b/packages/logger/src/transports/ConsoleTransport.ts
index 18a6f0b..3077e04 100644
--- a/packages/logger/src/transports/ConsoleTransport.ts
+++ b/packages/logger/src/transports/ConsoleTransport.ts
@@ -1,11 +1,11 @@
-import { ITransport } from './ITransport'
-import { IMessage } from '../IMessage'
+import { Transport } from './Transport'
+import { Message } from '../Message'
 import { LogLevel } from '../LogLevel'
 
-export class ConsoleTransport implements ITransport {
+export class ConsoleTransport implements Transport {
   constructor(readonly level: LogLevel) {}
 
-  write(entry: IMessage) {
+  write(entry: Message) {
     if (entry.level <= this.level) {
       switch (entry.level) {
         case LogLevel.ERROR:
@@ -24,6 +24,7 @@ export class ConsoleTransport implements ITransport {
         case LogLevel.DEBUG:
           // tslint:disable-next-line
           console.debug(entry.message)
+          break
         case LogLevel.OFF:
           // do nothing
       }
diff --git a/packages/logger/src/transports/ITransport.ts b/packages/logger/src/transports/ITransport.ts
deleted file mode 100644
index 6601835..0000000
--- a/packages/logger/src/transports/ITransport.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { IMessage } from '../IMessage'
-import { LogLevel } from '../LogLevel'
-
-export interface ITransport {
-  readonly level: LogLevel
-  write(message: IMessage): void
-}
diff --git a/packages/logger/src/transports/Transport.ts b/packages/logger/src/transports/Transport.ts
new file mode 100644
index 0000000..2b0fc62
--- /dev/null
+++ b/packages/logger/src/transports/Transport.ts
@@ -0,0 +1,7 @@
+import { Message } from '../Message'
+import { LogLevel } from '../LogLevel'
+
+export interface Transport {
+  readonly level: LogLevel
+  write(message: Message): void
+}
diff --git a/packages/logger/src/transports/index.ts b/packages/logger/src/transports/index.ts
index 714cc7e..76637b5 100644
--- a/packages/logger/src/transports/index.ts
+++ b/packages/logger/src/transports/index.ts
@@ -1,2 +1,2 @@
 export * from './ConsoleTransport'
-export * from './ITransport'
+export * from './Transport'