diff --git a/briar-api/src/net/sf/briar/api/plugins/InvitationConstants.java b/briar-api/src/net/sf/briar/api/plugins/InvitationConstants.java
index 9cdd4c628..bc4e2a784 100644
--- a/briar-api/src/net/sf/briar/api/plugins/InvitationConstants.java
+++ b/briar-api/src/net/sf/briar/api/plugins/InvitationConstants.java
@@ -12,5 +12,5 @@ public interface InvitationConstants {
 
 	int HASH_LENGTH = 48; // Bytes
 
-	int MAX_PUBLIC_KEY_LENGTH = 120; // Bytes
+	int MAX_PUBLIC_KEY_LENGTH = 97; // Bytes
 }
diff --git a/briar-api/src/net/sf/briar/api/protocol/ProtocolConstants.java b/briar-api/src/net/sf/briar/api/protocol/ProtocolConstants.java
index 5c1f684dd..a2aa0d79a 100644
--- a/briar-api/src/net/sf/briar/api/protocol/ProtocolConstants.java
+++ b/briar-api/src/net/sf/briar/api/protocol/ProtocolConstants.java
@@ -24,7 +24,7 @@ public interface ProtocolConstants {
 	int MAX_GROUP_NAME_LENGTH = 50;
 
 	/** The maximum length of a public key in bytes. */
-	int MAX_PUBLIC_KEY_LENGTH = 120;
+	int MAX_PUBLIC_KEY_LENGTH = 97;
 
 	/** The maximum length of an author's name in UTF-8 bytes. */
 	int MAX_AUTHOR_NAME_LENGTH = 50;