diff --git a/schema.json b/schema.json
index e7b1714..7b8fef0 100644
--- a/schema.json
+++ b/schema.json
@@ -202,6 +202,7 @@
       },
       "alpine": {
         "enum": [
+          "3.15",
           "3.16",
           "3.17",
           "3.18",
@@ -415,4 +416,4 @@
       "additionalProperties": false
     }
   }
-}
+}
\ No newline at end of file
diff --git a/systems.json b/systems.json
index dd0520b..dd7a8b8 100644
--- a/systems.json
+++ b/systems.json
@@ -42,7 +42,7 @@
     {
         "os": "linux",
         "distribution": "alpine",
-        "versions": [ "3.16", "3.17", "3.18", "3.19", "edge" ]
+        "versions": [ "3.15", "3.16", "3.17", "3.18", "3.19", "edge" ]
     },
     {
         "os": "windows"