diff --git a/bump_version.sh b/bump_version.sh
new file mode 100755
index 00000000..c133dda3
--- /dev/null
+++ b/bump_version.sh
@@ -0,0 +1,33 @@
+#/usr/bin/env bash
+
+# bump_version.sh (show|major|minor|patch|prerelease|build)
+
+VERSION_FILE=pshtt/__init__.py
+
+HELP_INFORMATION="bump_version.sh (show|major|minor|patch|prerelease|build|finalize)"
+
+old_version=$(sed "s/__version__ = '\(.*\)'/\1/" $VERSION_FILE)
+
+if [[ $# -ne 1 ]]
+then
+   echo $HELP_INFORMATION
+else
+    case $1 in
+        major|minor|patch|prerelease|build)
+            new_version=$(python -c "import semver; print(semver.bump_$1('$old_version'))")
+            echo Changing version from $old_version to $new_version
+            sed -i "s/$old_version/$new_version/" $VERSION_FILE
+            ;;
+        finalize)
+            new_version=$(python -c "import semver; print(semver.finalize_version('$old_version'))")
+            echo Changing version from $old_version to $new_version
+            sed -i "s/$old_version/$new_version/" $VERSION_FILE
+            ;;
+        show)
+            echo $old_version
+            ;;
+        *)
+            echo $HELP_INFORMATION
+            ;;
+    esac
+fi
diff --git a/pshtt/__init__.py b/pshtt/__init__.py
index f0ca8cfe..f0ede3d3 100644
--- a/pshtt/__init__.py
+++ b/pshtt/__init__.py
@@ -1 +1 @@
-__version__ = '0.4.0-dev'
+__version__ = '0.4.1'
diff --git a/setup.py b/setup.py
index 148c7d3d..9d4ebf2e 100755
--- a/setup.py
+++ b/setup.py
@@ -68,9 +68,10 @@
 
     extras_require={
         # 'dev': ['check-manifest'],
-        'test': [
+        'dev': [
+            'pytest',
+            'semver',
             'tox',
-            'pytest'
         ],
     },