diff --git a/common/Definitions.h b/common/Definitions.h
index 69758c91..d8bd9980 100644
--- a/common/Definitions.h
+++ b/common/Definitions.h
@@ -18,7 +18,7 @@
 
 #define FPGA_BUFFER_LOCATION_SIZE (RAW_MODULE_SIZE * sizeof(short))
 
-#define MIN_COUNT_TIME_IN_US 10
+#define MIN_COUNT_TIME_IN_US 5
 #define MIN_FRAME_TIME_HALF_SPEED_IN_US 1000
 #define MIN_FRAME_TIME_FULL_SPEED_IN_US 470
 #define MAX_FRAME_TIME 2000
diff --git a/frontend_ui/src/components/DetectorSettings.tsx b/frontend_ui/src/components/DetectorSettings.tsx
index e4ac48ca..fa0d7e1a 100644
--- a/frontend_ui/src/components/DetectorSettings.tsx
+++ b/frontend_ui/src/components/DetectorSettings.tsx
@@ -72,7 +72,7 @@ class DetectorSettings extends Component<MyProps, MyState> {
         }
 
         if (!count_err) {
-            if (Number(count_time) < 0)
+            if (Number(count_time) < 5)
                 count_err = true;
         }