diff --git a/models/ml/prep_encoding_splitting/covariate_encoding.py b/models/ml/prep_encoding_splitting/covariate_encoding.py
index 3b44892..c42fbde 100644
--- a/models/ml/prep_encoding_splitting/covariate_encoding.py
+++ b/models/ml/prep_encoding_splitting/covariate_encoding.py
@@ -5,7 +5,7 @@
 
 def model(dbt, session):
   # dbt configuration
-  dbt.config(packages=["pandas","numpy","scikit-learn"])
+  dbt.config(packages=["pandas==1.5.3","numpy","scikit-learn"])
 
   # get upstream data
   data = dbt.ref("ml_data_prep").to_pandas()
diff --git a/models/ml/prep_encoding_splitting/ml_data_prep.py b/models/ml/prep_encoding_splitting/ml_data_prep.py
index 29f2eaf..1f9ef5b 100644
--- a/models/ml/prep_encoding_splitting/ml_data_prep.py
+++ b/models/ml/prep_encoding_splitting/ml_data_prep.py
@@ -2,7 +2,7 @@
 
 def model(dbt, session):
     # dbt configuration
-    dbt.config(packages=["pandas"])
+    dbt.config(packages=["pandas==1.5.3"])
 
     # get upstream data
     fct_results = dbt.ref("mrt_results_circuits").to_pandas()
diff --git a/package-lock.yml b/package-lock.yml
new file mode 100644
index 0000000..c73bffd
--- /dev/null
+++ b/package-lock.yml
@@ -0,0 +1,4 @@
+packages:
+- package: dbt-labs/dbt_utils
+  version: 1.0.0
+sha1_hash: efa9169fb1f1a1b2c967378c02b60e3d85ae464b