diff --git a/requirements_dev.txt b/requirements_dev.txt
index 346fbbcf..d0b8c22f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -12,5 +12,5 @@ pypng == 0.0.20
 
 # Lint and formatting.
 black ==19.10b0
-flake8 ==3.8.2
+flake8 ==3.8.3
 flake8-import-order ==0.18.1