diff --git a/internal/transport/middleware/proofer/proofer.go b/internal/transport/middleware/proofer/proofer.go
index f76b0b6..e541e2a 100644
--- a/internal/transport/middleware/proofer/proofer.go
+++ b/internal/transport/middleware/proofer/proofer.go
@@ -106,7 +106,9 @@ func (mw *Proofer) handleSolutionCheck(c *gin.Context, solution string) error {
 	// Handle error
 	if err != nil {
 		mw.logger.Error("failed to check solution", zap.Error(err))
-		return err
+
+		// not retuning error here, because in any case we want to try to send a new challenge
+		// regardless if the client sent an invalid solution, tried to reuse a solution or there simply was an error
 	}
 
 	// If solution is not valid, return error and a new challenge, abort request
diff --git a/internal/transport/middleware/proofer/proofer_test.go b/internal/transport/middleware/proofer/proofer_test.go
index 232e4ff..6d83999 100644
--- a/internal/transport/middleware/proofer/proofer_test.go
+++ b/internal/transport/middleware/proofer/proofer_test.go
@@ -101,7 +101,7 @@ func TestProofer_Use(t *testing.T) {
 
 				// Assertions
 				assert.Equal(t, http.StatusInternalServerError, w.Code, "status code should be 500")
-				assert.Equal(t, "{\"error\":\"failed to check solution\"}", w.Body.String())
+				assert.Equal(t, "{\"error\":\"failed to get new challenge\"}{\"error\":\"failed to check solution\"}", w.Body.String())
 			})
 
 			t.Run("Incorrect solution, get back with a new one", func(t *testing.T) {