diff --git a/lib/common.sh b/lib/common.sh
index 0a40172..e10c5ce 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -377,7 +377,8 @@ function fetch_package_to_test() {
     git -C "$package_path" rev-parse HEAD > "$TEST_CONTEXT/commit"
     git -C "$package_path" show --no-patch --format=%ct HEAD > "$TEST_CONTEXT/commit_timestamp"
 
-    grep "^\s*version\s*=" "$package_path/manifest.toml" | cut -d= -f2 | tr -d '" ' > "$TEST_CONTEXT/app_version"
+    python3 -c "import sys; import toml; f = open(sys.argv[1], 'r'); print(toml.load(f)['version'])" \
+        "$package_path/manifest.toml" > "$TEST_CONTEXT/app_version"
 
     # Check if the package directory is really here.
     if [ ! -d "$package_path" ]; then