diff --git a/checksum/mdbx-0.2.1.gem.sha512 b/checksum/mdbx-0.2.1.gem.sha512
new file mode 100644
index 0000000..f77b347
--- /dev/null
+++ b/checksum/mdbx-0.2.1.gem.sha512
@@ -0,0 +1 @@
+6910d9836d84c1d38516dde012797f15ea45d9ffe71c0392ef1f4da9b7c0ede2a134fd681da305b3697ffe95be9beba9e6179acfcf2e7cea48762159a192f1df
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