diff --git a/schemars/src/json_schema_impls/semver.rs b/schemars/src/json_schema_impls/semver.rs
index 99c5db8e..37c1d249 100644
--- a/schemars/src/json_schema_impls/semver.rs
+++ b/schemars/src/json_schema_impls/semver.rs
@@ -14,7 +14,8 @@ impl JsonSchema for Version {
         SchemaObject {
             instance_type: Some(InstanceType::String.into()),
             string: Some(Box::new(StringValidation {
-                pattern: Some(r"^\d+\.\d+\.\d+([\-\+].+)?$".to_owned()),
+                // https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
+                pattern: Some(r"^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$".to_owned()),
                 ..Default::default()
             })),
             ..Default::default()
diff --git a/schemars/tests/expected/semver.json b/schemars/tests/expected/semver.json
index ceee11c8..d87ad047 100644
--- a/schemars/tests/expected/semver.json
+++ b/schemars/tests/expected/semver.json
@@ -6,7 +6,7 @@
   "properties": {
     "version": {
       "type": "string",
-      "pattern": "^\\d+\\.\\d+\\.\\d+([\\-\\+].+)?$"
+      "pattern": "^(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)(?:-((?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+([0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?$"
     }
   }
 }