diff --git a/src/TaskReRunner/Storage/ProcessData.cs b/src/TaskReRunner/Storage/ProcessData.cs
index e45a5ba..905d4a5 100644
--- a/src/TaskReRunner/Storage/ProcessData.cs
+++ b/src/TaskReRunner/Storage/ProcessData.cs
@@ -14,7 +14,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 
 using ArmoniK.Api.gRPC.V1;