diff --git a/checksum/mdbx-0.1.1.gem.sha512 b/checksum/mdbx-0.1.1.gem.sha512
new file mode 100644
index 0000000..26d971f
--- /dev/null
+++ b/checksum/mdbx-0.1.1.gem.sha512
@@ -0,0 +1 @@
+c8c39fd3b2921c757269c3f870d93922a0b763384241d0d5d51f34805295b507a23c23d368aa33c26cde0fd2533398bb353329b869c59c445f18cb655e5d53ed
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