diff --git a/lib/src/main/java/io/ably/lib/transport/Defaults.java b/lib/src/main/java/io/ably/lib/transport/Defaults.java
index ef16ea03d..d7627939d 100644
--- a/lib/src/main/java/io/ably/lib/transport/Defaults.java
+++ b/lib/src/main/java/io/ably/lib/transport/Defaults.java
@@ -8,7 +8,7 @@
 import java.util.Locale;
 
 public class Defaults {
-    public static final float ABLY_VERSION_NUMBER   = 1.2f;
+    public static final float ABLY_VERSION_NUMBER   = 1.0f;
 
     /**
      * The level of compatibility with the Ably service that this SDK supports, also referred to as the 'wire protocol version'.