diff --git a/requirements.txt b/requirements.txt
index fd62eb82244b7b99d7ec8eb99da9fcf18f6ab455..0478500e49e4642089b8c6497d4f4ee36c0e96d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@
 # Test dependencies
 flake8
 factory_boy==2.9.2
+isort==4.3.21
 wagtail-factories==1.1.0
 responses==0.10.4