diff --git a/src/main.c b/src/main.c
index 52b1f370..71c9dc32 100644
--- a/src/main.c
+++ b/src/main.c
@@ -150,6 +150,10 @@ int main(const int argc, char* argv[]) {
 
     herb_parse_ruby_to_stdout(ruby_source);
 
+    free(ruby_source);
+    free(output.value);
+    free(source);
+
     return 0;
   }