diff --git a/.releaserc.json b/.releaserc.json
index 05290de..6785053 100644
--- a/.releaserc.json
+++ b/.releaserc.json
@@ -13,7 +13,7 @@
     [
       "@semantic-release/git",
       {
-        "assets": ["pyproject.toml"],
+        "assets": ["pyproject.toml", "uv.lock"],
         "message": "chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}"
       }
     ]
diff --git a/scripts/update-version-number.sh b/scripts/update-version-number.sh
index 6ad3eb4..5ea35c8 100755
--- a/scripts/update-version-number.sh
+++ b/scripts/update-version-number.sh
@@ -9,3 +9,11 @@ fi
 echo "Updating Version to: $1"
 
 sed -i "s/version = \".*\"$/version = \"$1\"/" pyproject.toml
+
+# uv.lock records the project's own version as well; unless it matches pyproject.toml, `uv sync --locked` rejects
+# the lockfile
+sed -i "/^name = \"portal-client\"$/{n;s/^version = \".*\"$/version = \"$1\"/}" uv.lock
+if ! grep -A1 '^name = "portal-client"$' uv.lock | grep -qx "version = \"$1\""; then
+  >&2 echo "Could not update the portal-client version in uv.lock"
+  exit 1
+fi
diff --git a/uv.lock b/uv.lock
index 627ea96..02dcc35 100644
--- a/uv.lock
+++ b/uv.lock
@@ -166,7 +166,7 @@ wheels = [
 
 [[package]]
 name = "portal-client"
-version = "3.4.1"
+version = "3.5.0"
 source = { editable = "." }
 dependencies = [
     { name = "backoff" },