diff --git a/reference/speeduino.ini b/reference/speeduino.ini
index c3395d79..e5b6d34c 100644
--- a/reference/speeduino.ini
+++ b/reference/speeduino.ini
@@ -6,7 +6,7 @@
    MTversion      = 2.25
 
    queryCommand   = "Q"
-   signature      = "speeduino 201804"
+   signature      = "speeduino 201805-dev"
    versionInfo    = "S" ;This info is what is displayed to user
 
 [TunerStudio]
diff --git a/speeduino/comms.ino b/speeduino/comms.ino
index 43736249..77b4adfb 100644
--- a/speeduino/comms.ino
+++ b/speeduino/comms.ino
@@ -132,7 +132,7 @@ void command()
       break;
 
     case 'Q': // send code version
-      Serial.print("speeduino 201804");
+      Serial.print("speeduino 201805-dev");
       break;
 
     case 'r': //New format for the optimised OutputChannels
@@ -162,7 +162,7 @@ void command()
       break;
 
     case 'S': // send code version
-      Serial.print("Speeduino 2018.4");
+      Serial.print("Speeduino 2018.5-dev");
       currentStatus.secl = 0; //This is required in TS3 due to its stricter timings
       break;