diff --git a/.changeset/fix-hashmap-values-conversion.md b/.changeset/fix-hashmap-values-conversion.md
new file mode 100644
index 0000000..26fdbb9
--- /dev/null
+++ b/.changeset/fix-hashmap-values-conversion.md
@@ -0,0 +1,5 @@
+---
+"@codama/renderers-vixen-parser": patch
+---
+
+- Add HashMap values conversion when needed
\ No newline at end of file
diff --git a/src/getRenderMapVisitor.ts b/src/getRenderMapVisitor.ts
index 804fee8..daa5709 100644
--- a/src/getRenderMapVisitor.ts
+++ b/src/getRenderMapVisitor.ts
@@ -237,6 +237,19 @@ function getOptionTypeTransform(
     return returnTransform;
 }
 
+function getMapValueTransform(valueType: TypeNode): string {
+    switch (valueType.kind) {
+        case 'definedTypeLinkNode':
+            return '.into_proto()';
+        case 'publicKeyTypeNode':
+            return '.to_string()';
+        case 'numberTypeNode':
+            return getNumberTypeTransform(valueType);
+        default:
+            return '';
+    }
+}
+
 function getTransform(
     type: TypeNode,
     name: string,
@@ -270,6 +283,11 @@ function getTransform(
         case 'sizePrefixTypeNode':
             return getArrayTypeTransform(type.type, typeName, idlDefinedTypes);
 
+        case 'mapTypeNode': {
+            const valueTransform = getMapValueTransform(type.value);
+            return `self.${typeName}.into_iter().map(|(k, v)| (k, v${valueTransform})).collect()`;
+        }
+
         default:
             return `self.${typeName}`;
     }