diff --git a/app/src/main/java/eu/faircode/email/ContactInfo.java b/app/src/main/java/eu/faircode/email/ContactInfo.java
index 0f8dfe8202..1b7d39d8e6 100644
--- a/app/src/main/java/eu/faircode/email/ContactInfo.java
+++ b/app/src/main/java/eu/faircode/email/ContactInfo.java
@@ -75,7 +75,6 @@ import java.util.Map;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Future;
 
 import javax.mail.Address;
diff --git a/app/src/main/java/eu/faircode/email/EmailService.java b/app/src/main/java/eu/faircode/email/EmailService.java
index e11b5b35ac..ba7142a0f5 100644
--- a/app/src/main/java/eu/faircode/email/EmailService.java
+++ b/app/src/main/java/eu/faircode/email/EmailService.java
@@ -73,7 +73,6 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
-import java.util.concurrent.ExecutorService;
 import java.util.regex.Pattern;
 
 import javax.mail.AuthenticationFailedException;
diff --git a/app/src/main/java/eu/faircode/email/HtmlHelper.java b/app/src/main/java/eu/faircode/email/HtmlHelper.java
index af03739bd9..c4870b2145 100644
--- a/app/src/main/java/eu/faircode/email/HtmlHelper.java
+++ b/app/src/main/java/eu/faircode/email/HtmlHelper.java
@@ -109,7 +109,6 @@ import java.io.InputStream;
 import java.io.StringReader;
 import java.net.URI;
 import java.text.DateFormat;
-import java.text.Normalizer;
 import java.text.ParseException;
 import java.text.ParsePosition;
 import java.util.ArrayList;
diff --git a/app/src/main/java/eu/faircode/email/ImageHelper.java b/app/src/main/java/eu/faircode/email/ImageHelper.java
index b8a087010c..4d876176b0 100644
--- a/app/src/main/java/eu/faircode/email/ImageHelper.java
+++ b/app/src/main/java/eu/faircode/email/ImageHelper.java
@@ -78,7 +78,6 @@ import java.util.Date;
 import java.util.List;
 import java.util.Map;
 import java.util.WeakHashMap;
-import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Semaphore;
 
 class ImageHelper {