diff --git a/bundles/org.openhab.core.io.monitor/bnd.bnd b/bundles/org.openhab.core.io.monitor/bnd.bnd
index 36d286027be..f40f8337c3e 100644
--- a/bundles/org.openhab.core.io.monitor/bnd.bnd
+++ b/bundles/org.openhab.core.io.monitor/bnd.bnd
@@ -6,4 +6,6 @@ Import-Package: \
  org.osgi.service.*,\
  org.slf4j.*,\
  com.google.gson.*;version="[2.8,3)"
-Export-Package: io.micrometer.core.*
+Export-Package: io.micrometer.core.*;-split-package:=merge-first,\
+ org.HdrHistogram.*;-split-package:=merge-first,\
+ org.LatencyUtils.*;-split-package:=merge-first
diff --git a/bundles/org.openhab.core.io.monitor/pom.xml b/bundles/org.openhab.core.io.monitor/pom.xml
index cb0d57b4452..206758bab9f 100644
--- a/bundles/org.openhab.core.io.monitor/pom.xml
+++ b/bundles/org.openhab.core.io.monitor/pom.xml
@@ -31,6 +31,24 @@
       <version>1.6.3</version>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>org.hdrhistogram</groupId>
+      <artifactId>HdrHistogram</artifactId>
+      <version>2.1.12</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.latencyutils</groupId>
+      <artifactId>LatencyUtils</artifactId>
+      <version>2.0.3</version>
+      <scope>compile</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>org.hdrhistogram</groupId>
+          <artifactId>HdrHistogram</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
   </dependencies>
 
   <build>
diff --git a/bundles/org.openhab.core.io.monitor/src/main/java/org/openhab/core/io/monitor/internal/metrics/RuleMetric.java b/bundles/org.openhab.core.io.monitor/src/main/java/org/openhab/core/io/monitor/internal/metrics/RuleMetric.java
index d0b811b25e0..3605eb1e86a 100644
--- a/bundles/org.openhab.core.io.monitor/src/main/java/org/openhab/core/io/monitor/internal/metrics/RuleMetric.java
+++ b/bundles/org.openhab.core.io.monitor/src/main/java/org/openhab/core/io/monitor/internal/metrics/RuleMetric.java
@@ -65,7 +65,7 @@ public RuleMetric(BundleContext bundleContext, Collection<Tag> tags, RuleRegistr
     }
 
     @Override
-    public void bindTo(@io.micrometer.core.lang.NonNull MeterRegistry meterRegistry) {
+    public void bindTo(MeterRegistry meterRegistry) {
         unbind();
         logger.debug("RuleMetric is being bound...");
         this.meterRegistry = meterRegistry;
@@ -77,18 +77,20 @@ public void bindTo(@io.micrometer.core.lang.NonNull MeterRegistry meterRegistry)
 
     @Override
     public void unbind() {
-        if (meterRegistry == null) {
+        MeterRegistry mReg = meterRegistry;
+        if (mReg == null) {
             return;
-        }
-        for (Meter meter : meterRegistry.getMeters()) {
-            if (meter.getId().getTags().contains(CORE_RULE_METRIC_TAG)) {
-                meterRegistry.remove(meter);
+        } else {
+            for (Meter meter : mReg.getMeters()) {
+                if (meter.getId().getTags().contains(CORE_RULE_METRIC_TAG)) {
+                    mReg.remove(meter);
+                }
+            }
+            meterRegistry = null;
+            if (this.eventSubscriberRegistration != null) {
+                this.eventSubscriberRegistration.unregister();
+                this.eventSubscriberRegistration = null;
             }
-        }
-        meterRegistry = null;
-        if (this.eventSubscriberRegistration != null) {
-            this.eventSubscriberRegistration.unregister();
-            this.eventSubscriberRegistration = null;
         }
     }
 
@@ -106,25 +108,27 @@ public Set<String> getSubscribedEventTypes() {
 
     @Override
     public void receive(Event event) {
-        if (meterRegistry == null) {
+        MeterRegistry mReg = meterRegistry;
+        if (mReg == null) {
             logger.trace("Measurement not started. Skipping rule event processing");
             return;
-        }
-        String topic = event.getTopic();
-        String ruleId = topic.substring(RULES_TOPIC_PREFIX.length(), topic.indexOf(RULES_TOPIC_SUFFIX));
-        if (!event.getPayload().contains(RuleStatus.RUNNING.name())) {
-            logger.trace("Skipping rule status info with status other than RUNNING {}", event.getPayload());
-            return;
-        }
+        } else {
+            String topic = event.getTopic();
+            String ruleId = topic.substring(RULES_TOPIC_PREFIX.length(), topic.indexOf(RULES_TOPIC_SUFFIX));
+            if (!event.getPayload().contains(RuleStatus.RUNNING.name())) {
+                logger.trace("Skipping rule status info with status other than RUNNING {}", event.getPayload());
+                return;
+            }
 
-        logger.debug("Rule {} RUNNING - updating metric.", ruleId);
-        Set<Tag> tagsWithRule = new HashSet<>(tags);
-        tagsWithRule.add(Tag.of(RULE_ID_TAG_NAME, ruleId));
-        String ruleName = getRuleName(ruleId);
-        if (ruleName != null) {
-            tagsWithRule.add(Tag.of(RULE_NAME_TAG_NAME, ruleName));
+            logger.debug("Rule {} RUNNING - updating metric.", ruleId);
+            Set<Tag> tagsWithRule = new HashSet<>(tags);
+            tagsWithRule.add(Tag.of(RULE_ID_TAG_NAME, ruleId));
+            String ruleName = getRuleName(ruleId);
+            if (ruleName != null) {
+                tagsWithRule.add(Tag.of(RULE_NAME_TAG_NAME, ruleName));
+            }
+            mReg.counter(METRIC_NAME, tagsWithRule).increment();
         }
-        meterRegistry.counter(METRIC_NAME, tagsWithRule).increment();
     }
 
     private String getRuleName(String ruleId) {