2 files changed, 3 insertions, 2 deletions
diff --git a/src/main/java/de/pixart/messenger/entities/Contact.java b/src/main/java/de/pixart/messenger/entities/Contact.java
index 06f7ea4d0..1124b19e1 100644
--- a/src/main/java/de/pixart/messenger/entities/Contact.java
+++ b/src/main/java/de/pixart/messenger/entities/Contact.java
@@ -301,7 +301,7 @@ public class Contact implements ListItem, Blockable {
                     for (int i = 0; i < prints.length(); ++i) {
                         final String print = prints.isNull(i) ? null : prints.getString(i);
                         if (print != null && !print.isEmpty()) {
-                            fingerprints.add(prints.getString(i));
+                            fingerprints.add(prints.getString(i).toLowerCase(Locale.US));
                         }
                     }
                 }
diff --git a/src/main/java/de/pixart/messenger/entities/Conversation.java b/src/main/java/de/pixart/messenger/entities/Conversation.java
index f9932f67d..36f5c46f6 100644
--- a/src/main/java/de/pixart/messenger/entities/Conversation.java
+++ b/src/main/java/de/pixart/messenger/entities/Conversation.java
@@ -20,6 +20,7 @@ import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 
 import de.pixart.messenger.Config;
 import de.pixart.messenger.crypto.PgpDecryptionService;
@@ -639,7 +640,7 @@ public class Conversation extends AbstractEntity implements Blockable, Comparabl
                     return null;
                 }
                 DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey();
-                this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey);
+                this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey).toLowerCase(Locale.US);
             } catch (final OtrCryptoException | UnsupportedOperationException ignored) {
                 return null;
             }