diff --git a/contracts/src/main/proto/buf.lock b/contracts/src/main/proto/buf.lock
index dae0d5f8..75df9f21 100644
--- a/contracts/src/main/proto/buf.lock
+++ b/contracts/src/main/proto/buf.lock
@@ -4,5 +4,5 @@ deps:
   - remote: buf.build
     owner: restatedev
     repository: proto
-    commit: 4c536701ef5348ecbf3cd1ef6cf825fc
-    digest: shake256:0fdebe27d9653dc31f9951623e0c8dc68a161d2b55146cc22c0501d2bccb22d49ab9b2b80c8f4de8827c4ba168119296f14d323eed5162ef63f128803cc64f47
+    commit: 4de69fd4bcad4d829ebe7643a6f461d1
+    digest: shake256:d9e8a43e890ecbc53822abd7bff03367697f588f815b9beddc1e34675c886549ef262a1e91c8a678db31a7b18979f88ceb98d7017c79fab0ebb81062740f996e
diff --git a/contracts/src/main/proto/buf.yaml b/contracts/src/main/proto/buf.yaml
index e36161cd..967db93b 100644
--- a/contracts/src/main/proto/buf.yaml
+++ b/contracts/src/main/proto/buf.yaml
@@ -3,5 +3,5 @@
 # If you use protoc instead, you can ignore (or delete) this file
 version: v1
 deps:
-  - buf.build/restatedev/proto
+  - buf.build/restatedev/proto:0.4.0