diff --git a/00_Utilities/python/ci-requirements.txt b/00_Utilities/python/ci-requirements.txt
index cffeacb3..921b2325 100644
--- a/00_Utilities/python/ci-requirements.txt
+++ b/00_Utilities/python/ci-requirements.txt
@@ -4,9 +4,10 @@
 #
 #    pip-compile ci-requirements.in
 #
-attrs==21.4.0
+attrs==20.3.0
     # via
     #   flake8-bugbear
+    #   flake8-implicit-str-concat
     #   pytest
 flake8==4.0.1
     # via
@@ -17,10 +18,14 @@ flake8-bugbear==22.1.11
     # via -r ci-requirements.in
 flake8-comprehensions==3.8.0
     # via -r ci-requirements.in
+flake8-implicit-str-concat==0.2.0
+    # via -r ci-requirements.in
 iniconfig==1.1.1
     # via pytest
 mccabe==0.6.1
     # via flake8
+more-itertools==8.12.0
+    # via flake8-implicit-str-concat
 mypy==0.931
     # via -r ci-requirements.in
 mypy-extensions==0.4.3