diff --git a/Makefile b/Makefile
index 79e85a30a..67ed394e5 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ BENCH_OP_FLAVOR?=DEFAULT
 BENCH_TYPE?=latency
 NODE_VERSION=22.6
 BACKWARD_COMPAT_DATA_URL=https://github.com/zama-ai/tfhe-backward-compat-data.git
-BACKWARD_COMPAT_DATA_BRANCH?=v0.5
+BACKWARD_COMPAT_DATA_BRANCH?=$(shell ./scripts/backward_compat_data_version.py)
 BACKWARD_COMPAT_DATA_PROJECT=tfhe-backward-compat-data
 BACKWARD_COMPAT_DATA_DIR=$(BACKWARD_COMPAT_DATA_PROJECT)
 TFHE_SPEC:=tfhe
diff --git a/scripts/backward_compat_data_version.py b/scripts/backward_compat_data_version.py
new file mode 100755
index 000000000..c9aa240dc
--- /dev/null
+++ b/scripts/backward_compat_data_version.py
@@ -0,0 +1,13 @@
+#!/usr/bin/python3
+
+import tomllib
+
+fname = "tests/Cargo.toml"
+with open(fname, "rb") as f:
+    data = tomllib.load(f)
+
+    dev_dependencies = data.get("dev-dependencies")
+
+    branch_name = dev_dependencies["tfhe-backward-compat-data"].get("branch")
+
+    print(branch_name)