diff --git a/lib/specs/spec_0_3.js b/lib/specs/spec_0_3.js
index 4e5c6cd..6675295 100644
--- a/lib/specs/spec_0_3.js
+++ b/lib/specs/spec_0_3.js
@@ -35,7 +35,7 @@ const isValidAgainstSchema = ajv.compile(schema);
 
 function Spec03(_caller) {
   this.payload = {
-    specversion: "0.3",
+    specversion: schema.definitions.specversion.const,
     id: uuidv4()
   };
 
diff --git a/lib/specs/spec_1.js b/lib/specs/spec_1.js
index d188902..89e13b4 100644
--- a/lib/specs/spec_1.js
+++ b/lib/specs/spec_1.js
@@ -37,7 +37,7 @@ const isValidAgainstSchema = ajv.compile(schema);
 
 function Spec1(_caller) {
   this.payload = {
-    specversion: "1.0",
+    specversion: schema.definitions.specversion.const,
     id: uuidv4()
   };