diff --git a/tox.ini b/tox.ini
index b415f5b5f28..bc91dd8edaa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ skipsdist = True
 commands = bash .ci/flake8_wrapper.sh
 whitelist_externals = bash
 deps =
-    flake8
+    flake8==3.2.1
     flake8-docstrings==1.0.2
 
 [testenv:py33-lint]
@@ -17,7 +17,7 @@ deps = flake8
 [testenv:py34-lint]
 commands = bash .ci/flake8_py3_wrapper.sh
 whitelist_externals = bash
-deps = flake8
+deps = flake8==3.2.1
 
 [testenv:py35-lint]
 commands = bash .ci/flake8_py3_wrapper.sh
@@ -50,8 +50,8 @@ commands = bash .ci/flake8_wrapper_imports.sh
 whitelist_externals = bash
 skip_install = True
 deps =
-    flake8
-    flake8-import-order>=0.9
+    flake8==3.0.4
+    flake8-import-order==0.11
 
 [testenv:qunit]
 commands = bash run_tests.sh -q