diff --git a/validator/schema/platformsh.application.json b/validator/schema/platformsh.application.json
index fdae8ee..37ace90 100644
--- a/validator/schema/platformsh.application.json
+++ b/validator/schema/platformsh.application.json
@@ -91,8 +91,7 @@
           }
         },
         "required": [
-          "source",
-          "source_path"
+          "source"
         ],
         "additionalProperties": false
       },
@@ -381,8 +380,7 @@
               }
             },
             "required": [
-              "source",
-              "source_path"
+              "source"
             ],
             "additionalProperties": false
           },
@@ -789,8 +787,7 @@
                 }
               },
               "required": [
-                "source",
-                "source_path"
+                "source"
               ],
               "additionalProperties": false
             },
diff --git a/validator/schema/upsun.json b/validator/schema/upsun.json
index 7fc8bb1..7802f22 100644
--- a/validator/schema/upsun.json
+++ b/validator/schema/upsun.json
@@ -90,8 +90,7 @@
                 }
               },
               "required": [
-                "source",
-                "source_path"
+                "source"
               ],
               "additionalProperties": false
             },
@@ -376,8 +375,7 @@
                     }
                   },
                   "required": [
-                    "source",
-                    "source_path"
+                    "source"
                   ],
                   "additionalProperties": false
                 },
@@ -780,8 +778,7 @@
                       }
                     },
                     "required": [
-                      "source",
-                      "source_path"
+                      "source"
                     ],
                     "additionalProperties": false
                   },
diff --git a/validator/validator_test.go b/validator/validator_test.go
index af7564e..89834fd 100644
--- a/validator/validator_test.go
+++ b/validator/validator_test.go
@@ -24,6 +24,9 @@ func Test_validateUpsunConfig(t *testing.T) {
 applications:
   app1:
     type: "python:3.11"
+    mounts:
+      /mnt/data:
+        source: storage
 `),
 					},
 				},