diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac72595..10e3d82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 1.9.2
+## 1.10.0
 
 * switched underlying HTTP client from Jersey to Apache HTTP client
 
diff --git a/pom.xml b/pom.xml
index 3a8a677..4cdc78f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
     </developers>
 
     <properties>
-        <postmark.version>1.9.2</postmark.version>
+        <postmark.version>1.10.0</postmark.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <jackson.minimum.version>2.9.7</jackson.minimum.version>