1 files changed, 1 insertions, 1 deletions

diff --git a/docs/code_style.md b/docs/code_style.md

index 71aecd41f7..6ef6f80290 100644
--- a/docs/code_style.md
+++ b/docs/code_style.md
@@ -30,7 +30,7 @@ The necessary tools are detailed below.
 
     Install `flake8` with:
 
-        pip install --upgrade flake8
+        pip install --upgrade flake8 flake8-comprehensions
 
     Check all application and test code with: