diff --git a/CHANGELOG.md b/CHANGELOG.md
index dbc0cad..eb7034d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,18 @@ History
 =======
 
 
+0.2.5 (2020-02)
+------------------
+
+* Changing the default option in `TimeSeriesParameter`
+
+
+0.2.4 (2020-02)
+------------------
+
+* Added `TimeSeriesRecord` schemas
+
+
 0.2.3 (2020-02)
 ------------------
 
diff --git a/pom.xml b/pom.xml
index b0dfce4..9e981c6 100755
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <groupId>io.keyko.monitoring</groupId>
     <artifactId>schemas</artifactId>
     <packaging>jar</packaging>
-    <version>0.2.4</version>
+    <version>0.2.5</version>
     <name>Web3 Monitoring Schemas</name>
     <url>https://github.com/keyko-io/web3-monitoring-schemas</url>
 
diff --git a/src/main/resources/avro/TimeSeriesParameter.avsc b/src/main/resources/avro/TimeSeriesParameter.avsc
index 598ff4f..782e82d 100644
--- a/src/main/resources/avro/TimeSeriesParameter.avsc
+++ b/src/main/resources/avro/TimeSeriesParameter.avsc
@@ -13,7 +13,9 @@
     },
     {
       "name": "label",
-      "type": ["null","string"]
+      "type": "string",
+      "default": ""
+
     }
   ]
 }
\ No newline at end of file