diff --git a/apax.yml b/apax.yml
index a7f93e8..b5d29fe 100644
--- a/apax.yml
+++ b/apax.yml
@@ -5,7 +5,7 @@ targets:
   - "1500"
   - plcsim
 devDependencies:
-  "@ax/sdk": 5.1.1
+  "@ax/sdk": 2405.0.0
 variables:
   APAX_BUILD_ARGS:
     - "--debug"