diff --git a/.github/scripts/bump-versions.py b/.github/scripts/bump-versions.py
new file mode 100755
index 000000000..ec2d56a83
--- /dev/null
+++ b/.github/scripts/bump-versions.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+
+from concurrent.futures import Future, ThreadPoolExecutor, as_completed
+import itertools
+from pathlib import Path
+import re
+import subprocess
+import sys
+
+VERSION_STR = "VersionCode ="
+VERSION_REGEX = re.compile(f"{VERSION_STR} (\\d+)")
+BUMPED_FILES: list[Path] = []
+
+BOT_EMAIL = "aniyomi-bot@aniyomi.org"
+BOT_NAME = "aniyomi-bot[bot]"
+
+def has_match(query: str, file: Path) -> tuple[Path, bool]:
+    return (file, query in file.read_text())
+
+def find_files_with_match(query: str, include_multisrc: bool = True) -> list[Path]:
+    files = Path("src").glob("*/*/build.gradle")
+    if include_multisrc:
+        files = itertools.chain(files, Path("lib-multisrc").glob("*/build.gradle.kts"))
+
+    # Prevent bumping files twice.
+    files = filter(lambda file: file not in BUMPED_FILES, files)
+
+    # Use multiple threads to find matches.
+    with ThreadPoolExecutor() as executor:
+        futures = [executor.submit(has_match, query, file) for file in files]
+        results = map(Future.result, as_completed(futures))
+        return [path for path, result in results if result]
+
+def replace_version(match: re.Match) -> str:
+    version = int(match.group(1))
+    print(f"{version} -> {version + 1}")
+    return f"{VERSION_STR} {version + 1}"
+
+def bump_version(file: Path):
+    BUMPED_FILES.append(file)
+    with file.open("r+") as f:
+        print(f"\n{file}: ", end="")
+        text = VERSION_REGEX.sub(replace_version, f.read())
+        # Move the cursor to the start again, to prevent writing at the end
+        f.seek(0) 
+        f.write(text)
+
+def bump_lib_multisrc(theme: str):
+    for file in find_files_with_match(f"themePkg = '{theme}'", include_multisrc=False):
+        bump_version(file)
+
+def commit_changes():
+    paths = [str(path.resolve()) for path in BUMPED_FILES]
+    subprocess.check_call(["git", "config", "--local", "user.email", BOT_EMAIL])
+    subprocess.check_call(["git", "config", "--local", "user.name", BOT_NAME])
+    subprocess.check_call(["git", "add"] + paths)
+    subprocess.check_call(["git", "commit", "-S", "-m", "[skip ci] chore: Mass-bump on extensions"])
+    subprocess.check_call(["git", "push"])
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        # Regex to match the lib name in the path, like "unpacker" or "dood-extractor".
+        lib_regex = re.compile(r"lib/([a-z0-9-]+)/")
+        # Find matches and remove None results.
+        matches = filter(None, map(lib_regex.search, sys.argv[1:]))
+        for match in matches:
+            project_path = ":lib:" + match.group(1)
+            for file in find_files_with_match(project_path):
+                if file.parent.parent.name == "lib-multisrc":
+                    bump_lib_multisrc(file.parent.name)
+                else:
+                    bump_version(file)
+
+        if len(BUMPED_FILES) > 0:
+            commit_changes()
diff --git a/.github/scripts/bump-versions.sh b/.github/scripts/bump-versions.sh
deleted file mode 100755
index c218c74dc..000000000
--- a/.github/scripts/bump-versions.sh
+++ /dev/null
@@ -1,64 +0,0 @@
-#!/bin/bash
-versionStr="VersionCode ="
-bumpedFiles=""
-
-# cut -d "=" -f 2 -> string.split("=")[1]
-# "extVersionCode = 6" -> ["extVersionCode ", " 6"] -> " 6" -> "6"
-getValue() { cut -d "=" -f 2 | cut -d " " -f 2;}
-getVersion() {
-    grep "$versionStr" "$1" | getValue
-}
-
-bumpVersion() {
-    local file=$1
-    local oldVersion=$(getVersion $file)
-    local newVersion=$((oldVersion + 1))
-
-    echo -e "\n$file: $oldVersion -> $newVersion\n"
-    sed -i "s/$versionStr $oldVersion/$versionStr $newVersion/" $file
-}
-
-bumpLibMultisrcVersion() {
-    local themeName=$(echo $1 | grep -Eo "lib-multisrc/\w+" | cut -c 14-)
-    for file in $(grep -l -R "themePkg = '$themeName'" --include build.gradle src/); do
-        # prevent bumping the same extension multiple times
-        if [[ ! $bumpedFiles =~ ( |^)$file( |$) ]]; then
-            bumpedFiles+="$file "
-            bumpVersion $file
-        fi
-    done
-}
-
-findAndBump() {
-    for lib in $@; do
-        for file in $(grep -l -R ":lib:$lib" --include "build.gradle" --include "build.gradle.kts" src/ lib-multisrc/); do
-            # prevent bumping the same extension multiple times
-            if [[ ! $bumpedFiles =~ ( |^)$file( |$) ]]; then
-                if [[ $file =~ ^lib-multisrc ]]; then
-                    bumpLibMultisrcVersion ${file/build.gradle.kts/}
-                else
-                    bumpedFiles+="$file "
-                    bumpVersion $file
-                fi
-            fi
-        done
-    done
-
-    commitChanges $bumpedFiles
-}
-
-commitChanges() {
-    if [[ -n "$@" ]]; then
-        git config --global user.email "aniyomi-bot@aniyomi.org"
-        git config --global user.name "aniyomi-bot[bot]"
-        git add $@
-        git commit -S -m "[skip ci] chore: Mass-bump on extensions"
-        git push
-    fi
-}
-
-# lib/cryptoaes/build.gradle.kts -> lib/cryptoaes -> cryptoaes
-modified=$(echo $@ | tr " " "\n" | grep -Eo "^lib/\w+" | sort | uniq | cut -c 5-)
-if [[ -n "$modified" ]]; then
-    findAndBump $modified
-fi
diff --git a/.github/workflows/build_push.yml b/.github/workflows/build_push.yml
index ecb694fc5..592560920 100644
--- a/.github/workflows/build_push.yml
+++ b/.github/workflows/build_push.yml
@@ -52,7 +52,7 @@ jobs:
       - name: Bump extensions that uses a modified lib
         if: steps.modified-libs.outputs.any_changed == 'true'
         run: |
-          ./.github/scripts/bump-versions.sh ${{ steps.modified-libs.outputs.all_changed_files }}
+          ./.github/scripts/bump-versions.py ${{ steps.modified-libs.outputs.all_changed_files }}
 
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@a494d935f4b56874c4a5a87d19af7afcf3a163d0 # v2