diff --git a/website/src/locales/cs.json b/website/src/locales/cs.json
index 9c0e06f0..9adb0040 100644
--- a/website/src/locales/cs.json
+++ b/website/src/locales/cs.json
@@ -100,6 +100,7 @@
             "activities": {
                 "bike": "Kolo",
                 "racing_bike": "Road bike",
+                "gravel_bike": "Gravel bike",
                 "mountain_bike": "Horské kolo",
                 "foot": "Chůze/běh",
                 "motorcycle": "Motocykl",