diff --git a/m2cgen/assemblers/boosting.py b/m2cgen/assemblers/boosting.py
index d4404976..72eabbca 100644
--- a/m2cgen/assemblers/boosting.py
+++ b/m2cgen/assemblers/boosting.py
@@ -66,7 +66,8 @@ def _assemble_multi_class_output(self, estimator_params):
         return ast.VectorVal(proba_exprs)
 
     def _assemble_bin_class_output(self, estimator_params):
-        # Base score is calculated based on https://github.com/dmlc/xgboost/blob/master/src/objective/regression_loss.h#L64  # noqa
+        # Base score is calculated based on
+        # https://github.com/dmlc/xgboost/blob/8de7f1928e4815843fbf8773a5ac7ecbc37b2e15/src/objective/regression_loss.h#L91
         # return -logf(1.0f / base_score - 1.0f);
         base_score = 0
         if self._base_score != 0:
diff --git a/m2cgen/cli.py b/m2cgen/cli.py
index 35a2bcae..5e33bfc9 100644
--- a/m2cgen/cli.py
+++ b/m2cgen/cli.py
@@ -111,7 +111,7 @@ def generate_code(args):
         # the same as the default value of the keyword argument of the exporter
         # (this is due to languages like C# which prefer their method names to
         # follow PascalCase unlike all the other supported languages -- see
-        # https://github.com/BayesWitnesses/m2cgen/pull/166/files#r379867601
+        # https://github.com/BayesWitnesses/m2cgen/pull/166#discussion_r379867601
         # for more).
         if arg_name == 'function_name' and arg_value is None:
             param = inspect.signature(exporter).parameters['function_name']