diff --git a/constraints-3.6.txt b/constraints-3.6.txt
index 44e67cb..cbc1975 100644
--- a/constraints-3.6.txt
+++ b/constraints-3.6.txt
@@ -230,7 +230,7 @@
 filelock==3.3.2
 fissix==21.6.6
 flake8-colors==0.1.9
-flake8==4.0.1
+flake8==3.9.2
 flaky==3.7.0
 flower==1.0.0
 freezegun==1.1.0
@@ -408,7 +408,7 @@
 pyarrow==4.0.1
 pyasn1-modules==0.2.8
 pyasn1==0.4.8
-pycodestyle==2.8.0
+pycodestyle==2.7.0
 pycountry==20.7.3
 pycparser==2.21
 pycryptodome==3.11.0
@@ -418,7 +418,7 @@
 pydruid==0.6.2
 pyenchant==3.2.2
 pyexasol==0.21.1
-pyflakes==2.4.0
+pyflakes==2.3.1
 pykerberos==1.2.1
 pymongo==3.12.1
 pymssql==2.2.2
diff --git a/constraints-3.7.txt b/constraints-3.7.txt
index 9281e5c..180a705 100644
--- a/constraints-3.7.txt
+++ b/constraints-3.7.txt
@@ -227,7 +227,7 @@
 filelock==3.3.2
 fissix==21.6.6
 flake8-colors==0.1.9
-flake8==4.0.1
+flake8==3.9.2
 flaky==3.7.0
 flower==1.0.0
 freezegun==1.1.0
@@ -415,7 +415,7 @@
 pydruid==0.6.2
 pyenchant==3.2.2
 pyexasol==0.21.1
-pyflakes==2.4.0
+pyflakes==2.3.1
 pykerberos==1.2.1
 pymongo==3.12.1
 pymssql==2.2.2
diff --git a/constraints-source-providers-3.6.txt b/constraints-source-providers-3.6.txt
index 3e44c0c..9a0c83c 100644
--- a/constraints-source-providers-3.6.txt
+++ b/constraints-source-providers-3.6.txt
@@ -337,7 +337,7 @@
 pyarrow==4.0.1
 pyasn1-modules==0.2.8
 pyasn1==0.4.8
-pycodestyle==2.8.0
+pycodestyle==2.7.0
 pycountry==20.7.3
 pycparser==2.21
 pycryptodome==3.11.0
diff --git a/constraints-source-providers-3.7.txt b/constraints-source-providers-3.7.txt
index b23e763..79e28fa 100644
--- a/constraints-source-providers-3.7.txt
+++ b/constraints-source-providers-3.7.txt
@@ -156,7 +156,7 @@
 filelock==3.3.2
 fissix==21.6.6
 flake8-colors==0.1.9
-flake8==4.0.1
+flake8==3.9.2
 flaky==3.7.0
 flower==1.0.0
 freezegun==1.1.0
@@ -334,7 +334,7 @@
 pyarrow==4.0.1
 pyasn1-modules==0.2.8
 pyasn1==0.4.8
-pycodestyle==2.8.0
+pycodestyle==2.7.0
 pycountry==20.7.3
 pycparser==2.21
 pycryptodome==3.11.0
@@ -344,7 +344,7 @@
 pydruid==0.6.2
 pyenchant==3.2.2
 pyexasol==0.21.1
-pyflakes==2.4.0
+pyflakes==2.3.1
 pykerberos==1.2.1
 pymongo==3.12.1
 pymssql==2.2.2