diff --git a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/GitHubUsersModule.java b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/GitHubUsersModule.java
index de60174..81600f0 100644
--- a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/GitHubUsersModule.java
+++ b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/GitHubUsersModule.java
@@ -43,7 +43,6 @@
 import javax.inject.Named;
 import javax.inject.Singleton;
 import rx.Observable;
-import rx.Observer;
 import rx.subjects.PublishSubject;
 
 /**
diff --git a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/error/ExceptionHandler.java b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/error/ExceptionHandler.java
index 02b3fa2..a537cec 100644
--- a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/error/ExceptionHandler.java
+++ b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/error/ExceptionHandler.java
@@ -28,7 +28,6 @@
 import java.util.function.Consumer;
 import javax.inject.Inject;
 import javax.inject.Singleton;
-import rx.Observer;
 
 /**
  * Handler of uncaught exceptions in this app. It will log the error using
diff --git a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/service/GitHubApiErrorHandler.java b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/service/GitHubApiErrorHandler.java
index 0e1b72d..916e92f 100644
--- a/github-users-web-client/src/main/java/com/xemantic/githubusers/web/service/GitHubApiErrorHandler.java
+++ b/github-users-web-client/src/main/java/com/xemantic/githubusers/web/service/GitHubApiErrorHandler.java
@@ -28,7 +28,6 @@
 import java.util.function.Consumer;
 import javax.inject.Inject;
 import javax.inject.Singleton;
-import rx.Observer;
 
 /**
  * Error handler for GitHub APIs.