diff --git a/rkyv-fix-metadata.diff b/rkyv-fix-metadata.diff
new file mode 100644
index 0000000..d460667
--- /dev/null
+++ b/rkyv-fix-metadata.diff
@@ -0,0 +1,11 @@
+--- rkyv-0.7.5/Cargo.toml	1970-01-01T00:00:01+00:00
++++ rkyv-0.7.5/Cargo.toml	2021-08-06T00:12:58.183014+00:00
+@@ -30,7 +30,7 @@
+ default-features = false
+ 
+ [dependencies.hashbrown]
+-version = "0.11"
++version = "0.9"
+ optional = true
+ 
+ [dependencies.indexmap]