diff --git a/requirements/prod.txt b/requirements/prod.txt
index 142d80f..b1eb864 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -37,4 +37,4 @@ Flask-Caching>=1.7.2
 Flask-DebugToolbar==0.11.0
 
 # Environment variable parsing
-environs==8.0.0
+environs==9.3.1