--- tools/compiler_version.ml
+++ tools/compiler_version.ml
@@ -89,6 +89,7 @@
 let v5_3_0 = mk 5 3 0
 let v5_4_0 = mk 5 4 0
 let v5_4_1 = mk 5 4 1
+let v5_5_0 = mk 5 5 0
 
 let known_versions =
 [
@@ -137,6 +138,7 @@
   v5_3_0;
   v5_4_0;
   v5_4_1;
+  v5_5_0;
 ]
 
 let is_known v = List.mem v known_versions