diff --git a/calc/Cargo.lock b/calc/Cargo.lock
index e8f26f4be..44c8208a5 100644
--- a/calc/Cargo.lock
+++ b/calc/Cargo.lock
@@ -28,7 +28,7 @@ checksum = "65c1bf4a04a88c54f589125563643d773f3254b5c38571395e2b591c693bbc81"
 
 [[package]]
 name = "calc"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "console_error_panic_hook",
  "console_log",
diff --git a/calc/Cargo.toml b/calc/Cargo.toml
index 21d4ff98d..0b2ace53c 100644
--- a/calc/Cargo.toml
+++ b/calc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "calc"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/calc/pkg/calc_bg.wasm b/calc/pkg/calc_bg.wasm
index d102c13f1..ef71030dc 100644
Binary files a/calc/pkg/calc_bg.wasm and b/calc/pkg/calc_bg.wasm differ
diff --git a/calc/pkg/package.json b/calc/pkg/package.json
index 01ad9f76a..e64216513 100644
--- a/calc/pkg/package.json
+++ b/calc/pkg/package.json
@@ -4,7 +4,7 @@
     "Parity Technologies <admin@parity.io>"
   ],
   "description": "Off-chain calculations for @substrate/api-sidecar.",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",