diff --git a/shard.yml b/shard.yml
index a76dfe3..fc816d7 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,11 +1,11 @@
 name: secp256k1
-version: 0.3.0
+version: 0.3.1
 description: "a native library implementing secp256k1 for the crystal language"
 
 authors:
   - /raw PONG _GHMoaCXLT <58883403+q9f@users.noreply.github.com>
 
-crystal: 0.32.1
+crystal: 0.33.0
 
 license: APLv2
 
diff --git a/src/version.cr b/src/version.cr
index aa78e91..c25b6b4 100644
--- a/src/version.cr
+++ b/src/version.cr
@@ -19,5 +19,5 @@
 # Ref: [en.bitcoin.it/wiki/Secp256k1](https://en.bitcoin.it/wiki/Secp256k1)
 module Secp256k1
   # The `VERSION` of the `Secp256k1` module.
-  VERSION = "0.3.0"
+  VERSION = "0.3.1"
 end