diff --git a/VERSION b/VERSION
index 1454f6e..4d54dad 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.1
+4.0.2
diff --git a/src/utils/common.py b/src/utils/common.py
index d79a66b..0c1ab88 100644
--- a/src/utils/common.py
+++ b/src/utils/common.py
@@ -89,3 +89,7 @@ def is_uuid (var):
 
 def is_not_uuid (var):
     return not is_uuid(var)
+
+_allowed_chars_pattern = re.compile(r'[^a-zA-Z0-9_\-\.]')
+def sanitize_metric_name(name: str):
+    return re.sub(_allowed_chars_pattern, '_', name)
diff --git a/src/utils/counter.py b/src/utils/counter.py
index e0e50d9..0ea6bda 100644
--- a/src/utils/counter.py
+++ b/src/utils/counter.py
@@ -1,9 +1,11 @@
 from prometheus_client import Counter
 
 from utils.cid import get_current_cid
+from utils.common import sanitize_metric_name
 from utils.otel import get_otel_meter
 
 def create_counter(name, description):
+    name = sanitize_metric_name(name)
     return {
         'otel': get_otel_meter().create_counter(
                     name = name,
diff --git a/src/utils/gauge.py b/src/utils/gauge.py
index 7e116df..fde1e9e 100644
--- a/src/utils/gauge.py
+++ b/src/utils/gauge.py
@@ -3,12 +3,14 @@
 from prometheus_client import Gauge
 from opentelemetry.metrics import Observation
 
+from utils.common import sanitize_metric_name
 from utils.otel import get_otel_meter
 
 _numeric_value_pattern = r"-?\d+\.\d+"
 _current_gauge_values = {}
 
 def create_gauge(name, description):
+    name = sanitize_metric_name(name)
     _current_gauge_values[name] = 0.0
 
     def observable_gauge_func(_):