diff --git a/release.sh b/release.sh
new file mode 100755
index 00000000..d3a6a4a2
--- /dev/null
+++ b/release.sh
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+
+# Fail if any command fails
+set -e
+
+PROJECT=$1
+VERSION=$2
+
+# Sanity check that we actually have a version
+if [ "$VERSION" = "" ]; then
+    echo "Usage $0 <project> <version>"
+    exit 1
+fi
+
+# Check the format of version
+if [ ! "$(echo "$VERSION" | grep -E "^[0-9]+\.[0-9]+\.[0-9]+$")" ]; then
+    echo "Version must be of the form x.y.z, got $VERSION"
+    exit 1
+fi
+
+# Set up $DIRECTORY and $TAGNAME
+case "$PROJECT" in
+    agb)
+        DIRECTORY="agb"
+        TAGNAME="v$VERSION"
+        ;;
+    agb-image-converter)
+        DIRECTORY="agb-image-converter"
+        TAGNAME="agb-image-converter/v$VERSION"
+        ;;
+    mgba-test-runner)
+        DIRECTORY="mgba-test-runner"
+        TAGNAME="mgba-test-runner/v$VERSION"
+        ;;
+
+    *)
+        echo "Unknown project name $PROJECT"
+        exit 1
+        ;;
+esac
+
+# Check that no out-standing changes in git
+if [ ! -z "$(git status --porcelain)" ]; then
+    echo "Uncommitted changes, please commit first"
+    exit 1
+fi
+
+# Check that we are in the master branch
+if [ "$(git symbolic-ref --short HEAD)" != "master" ]; then
+    echo "You must be in the master branch before releasing"
+    exit 1
+fi
+
+# Sanity check to make sure the build works
+(cd agb && cargo test)
+(cd agb-image-converter && cargo test)
+
+# Update the version in Cargo.toml
+sed -i -e "s/^version = \".*\"/version = \"$VERSION\"/" "$DIRECTORY/Cargo.toml"
+
+# Also update the lock file
+(cd "$DIRECTORY" && cargo update)
+git add "$DIRECTORY/Cargo.toml"
+
+if [ "$PROJECT" = "agb" ]; then
+    # also update the agb version in the template
+    sed -i -e "s/^agb = \".*\"/agb = \"$VERSION\"/" template/Cargo.toml
+    git add template/Cargo.toml
+fi
+
+# Commit the Cargo.toml changes
+git commit -m "Release $PROJECT v$VERSION"
+
+# Tag the version
+git tag -a $TAGNAME -m "$PROJECT - v$VERSION"
+
+echo "Done! Push with"
+echo "git push --atomic origin master $TAGNAME"
\ No newline at end of file