diff --git a/.github/workflows/ci-it.yml b/.github/workflows/ci-it.yml
index 89d5a3f..90bb2ff 100644
--- a/.github/workflows/ci-it.yml
+++ b/.github/workflows/ci-it.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        jdk: [ 11, 17, 21 ]
+        jdk: [ 17, 21 ]
         vault: [ '1.2.0', '1.20.0' ]
         include:
           - jdk: 21
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 61e4979..90025bf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        jdk: [ 11, 17, 21 ]
+        jdk: [ 17, 21 ]
         include:
           - jdk: 21
             analysis: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b71a64..f95b1c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 1.5.2 (2025-07-16)
 
+### Breaking
+* Requires Java 17 or later (#100)
+
 ### Dependencies
 * Updated Jackson to 2.19.1 (#101)
 
diff --git a/pom.xml b/pom.xml
index 1d669f8..24aa4d6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
     <groupId>de.stklcode.jvault</groupId>
     <artifactId>jvault-connector</artifactId>
-    <version>1.5.3-SNAPSHOT</version>
+    <version>2.0.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -109,7 +109,7 @@
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>3.14.0</version>
                     <configuration>
-                        <release>11</release>
+                        <release>17</release>
                     </configuration>
                 </plugin>
                 <plugin>
@@ -200,7 +200,7 @@
                                     <version>[3.6.3,)</version>
                                 </requireMavenVersion>
                                 <requireJavaVersion>
-                                    <version>[11,)</version>
+                                    <version>[17,)</version>
                                 </requireJavaVersion>
                             </rules>
                         </configuration>
@@ -246,7 +246,7 @@
                         <artifactId>maven-javadoc-plugin</artifactId>
                         <version>3.11.2</version>
                         <configuration>
-                            <source>11</source>
+                            <source>17</source>
                         </configuration>
                         <executions>
                             <execution>