diff --git a/justfile b/justfile
index fb6c094..853e55e 100644
--- a/justfile
+++ b/justfile
@@ -133,13 +133,24 @@ test-race:
 bump new:
     #!/usr/bin/env bash
     set -euo pipefail
-    [[ "{{new}}" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]] || { echo "Usage: just bump X.Y.Z"; exit 1; }
-    perl -pi -e 's/^const version = ".*"/const version = "{{new}}"/' {{pkg}}/main.go
-    perl -pi -e 's/version = ".*"/version = "{{new}}"/' flake.nix
-    perl -pi -e 's/!define VERSION ".*"/!define VERSION "{{new}}"/' packaging/windows/installer.nsi
-    perl -pi -e 's|(<string>)[^<]*(</string>)|${1}{{new}}${2}| if $prev =~ /CFBundle(Version|ShortVersionString)/; $prev = $_' packaging/darwin/Info.plist
-    echo "Bumped to {{new}}"
-    grep -n "{{new}}" {{pkg}}/main.go flake.nix packaging/windows/installer.nsi packaging/darwin/Info.plist
+    current="{{version}}"
+    new="{{new}}"
+    case "$new" in
+        patch|minor|major)
+            IFS=. read -r current_major current_minor current_patch <<< "$current"
+            case "$new" in
+                patch) new="$current_major.$current_minor.$((current_patch + 1))" ;;
+                minor) new="$current_major.$((current_minor + 1)).0" ;;
+                major) new="$((current_major + 1)).0.0" ;;
+            esac ;;
+    esac
+    [[ "$new" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]] || { echo "Usage: just bump X.Y.Z|patch|minor|major"; exit 1; }
+    perl -pi -e "s/^const version = \".*\"/const version = \"$new\"/" {{pkg}}/main.go
+    perl -pi -e "s/version = \".*\"/version = \"$new\"/" flake.nix
+    perl -pi -e "s/!define VERSION \".*\"/!define VERSION \"$new\"/" packaging/windows/installer.nsi
+    perl -pi -e 's|(<string>)[^<]*(</string>)|${1}'"$new"'${2}| if $prev =~ /CFBundle(Version|ShortVersionString)/; $prev = $_' packaging/darwin/Info.plist
+    echo "Bumped to $new"
+    grep -n "$new" {{pkg}}/main.go flake.nix packaging/windows/installer.nsi packaging/darwin/Info.plist
 
 clean:
     rm -rf {{bin}} {{dist}} result