diff --git a/requirements.txt b/requirements.txt
index d492f02..1f0dfaf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,6 +29,7 @@
 # https://pypi.org/project/robotframework/#history
 # -----------------------------------------------------------------------
 robotframework==3.1.2                    # 2019-05-24
+# robotframework==6.1.1                    # 2019-05-24
 robotframework-kafkalibrary==0.0.3
 robotframework-lint==1.0
 robotframework-requests==0.7.0
@@ -58,4 +59,8 @@
 protobuf3-to-dict>=0.1.5
 device-management-interface>=1.2.1
 
+pre-commit
+
+# https://github.com/robotframework/robotframework/tree/v6.1.1#readme
+
 # [EOF]