diff --git a/Makefile b/Makefile
index c4fc33d751..eb0776fd57 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ BENCH_OP_FLAVOR?=DEFAULT
 NODE_VERSION=22.6
 FORWARD_COMPAT?=OFF
 BACKWARD_COMPAT_DATA_URL=https://github.com/zama-ai/tfhe-backward-compat-data.git
-BACKWARD_COMPAT_DATA_BRANCH?=v0.3
+BACKWARD_COMPAT_DATA_BRANCH?=v0.4
 BACKWARD_COMPAT_DATA_PROJECT=tfhe-backward-compat-data
 BACKWARD_COMPAT_DATA_DIR=$(BACKWARD_COMPAT_DATA_PROJECT)
 TFHE_SPEC:=tfhe
diff --git a/tfhe/Cargo.toml b/tfhe/Cargo.toml
index a43ce312b4..31db1b447c 100644
--- a/tfhe/Cargo.toml
+++ b/tfhe/Cargo.toml
@@ -46,7 +46,7 @@ hex = "0.4.3"
 # End regex-engine deps
 # Used for backward compatibility test metadata
 ron = "0.8"
-tfhe-backward-compat-data = { git = "https://github.com/zama-ai/tfhe-backward-compat-data.git", branch = "v0.3", default-features = false, features = [
+tfhe-backward-compat-data = { git = "https://github.com/zama-ai/tfhe-backward-compat-data.git", branch = "v0.4", default-features = false, features = [
     "load",
 ] }