diff --git a/.travis.yml b/.travis.yml
index db37ec3..fad41d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,9 @@ android:
   components:
     - tools
     - platform-tools
-    - build-tools-24.0.2
+    - build-tools-24.0.3
     - extra-android-m2repository
-    - android-24
+    - android-25
 
 jdk:
   - oraclejdk8
diff --git a/README.md b/README.md
index efae377..a5a0e89 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 **kotlin extension** to **pluralize** and **singularize** strings
 
-[![Build Status](https://travis-ci.org/cesarferreira/kotlin-pluralizer.svg?branch=master)](https://travis-ci.org/cesarferreira/kotlin-pluralizer) [![Release](https://jitpack.io/v/cesarferreira/kotlin-pluralizer.svg)](https://jitpack.io/#cesarferreira/kkotlin-pluralizer)
+[![Build Status](https://travis-ci.org/cesarferreira/kotlin-pluralizer.svg?branch=master)](https://travis-ci.org/cesarferreira/kotlin-pluralizer) [![Release](https://jitpack.io/v/cesarferreira/kotlin-pluralizer.svg)](https://jitpack.io/#cesarferreira/kotlin-pluralizer)
 
 ### Show some love
 [![GitHub followers](https://img.shields.io/github/followers/cesarferreira.svg?style=social&label=Follow)](https://github.com/cesarferreira/kotlin-pluralizer)   [![Twitter Follow](https://img.shields.io/twitter/follow/cesarmcferreira.svg?style=social)](https://twitter.com/cesarmcferreira)
@@ -43,7 +43,7 @@ repositories {
     maven { url "https://jitpack.io" }
  }
  dependencies {
-    compile 'com.github.cesarferreira:kotlin-pluralizer:0.2.7'
+    compile 'com.github.cesarferreira:kotlin-pluralizer:0.2.9'
  }
  ```
 
diff --git a/android-sample/build.gradle b/android-sample/build.gradle
index 18bffd7..c3e679e 100644
--- a/android-sample/build.gradle
+++ b/android-sample/build.gradle
@@ -12,11 +12,11 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 25
+    buildToolsVersion "24.0.3"
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 24
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -38,8 +38,8 @@ android {
 dependencies {
     compile project(':library')
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    compile 'com.android.support:appcompat-v7:24.2.0'
-    compile 'com.android.support:design:24.2.0'
+    compile 'com.android.support:appcompat-v7:25.1.0'
+    compile 'com.android.support:design:25.1.0'
 }
 repositories {
     mavenCentral()
diff --git a/build.gradle b/build.gradle
index 8413d7a..dc8c0f7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.0.3'
+    ext.kotlin_version = '1.0.6'
 
     ext {
       ext_groupId = 'com.cesarferreira'
       ext_artifactId = 'kotlin-pluralizer'
-      ext_version = '0.2.5'
+      ext_version = '0.2.9'
       ext_url = 'https://github.com/cesarferreira/kotlin-pluralizer'
       ext_vcsUrl = 'https://github.com/cesarferreira/kotlin-pluralizer.git'
       ext_description = 'Kotlin extension to pluralize and singularize strings'
@@ -16,7 +16,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:2.2.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e58f963..3fb1e18 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
diff --git a/library/src/main/kotlin/com/cesarferreira/pluralize/Pluralize.kt b/library/src/main/kotlin/com/cesarferreira/pluralize/Pluralize.kt
index b9cbc59..159c823 100644
--- a/library/src/main/kotlin/com/cesarferreira/pluralize/Pluralize.kt
+++ b/library/src/main/kotlin/com/cesarferreira/pluralize/Pluralize.kt
@@ -45,7 +45,7 @@ fun String.singularize(count: Int): String {
 }
 
 private fun String.pluralizer(): String {
-    if (unCountable().contains(this)) return this
+    if (unCountable().contains(this.toLowerCase())) return this
     val rule = pluralizeRules().last { Pattern.compile(it.component1(), Pattern.CASE_INSENSITIVE).matcher(this).find() }
     var found = Pattern.compile(rule.component1(), Pattern.CASE_INSENSITIVE).matcher(this).replaceAll(rule.component2())
     val endsWith = exceptions().firstOrNull { this.endsWith(it.component1()) }
@@ -56,7 +56,7 @@ private fun String.pluralizer(): String {
 }
 
 private fun String.singularizer(): String {
-    if (unCountable().contains(this)) {
+    if (unCountable().contains(this.toLowerCase())) {
         return this
     }
     val exceptions = exceptions().firstOrNull() { this.equals(it.component2()) }