diff --git a/.github/workflows/ci-it.yml b/.github/workflows/ci-it.yml
index 23bea61..ae4e5ae 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', '1.19.0' ]
         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 86cf3d5..c7d77bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## unreleased
+
+### Breaking
+* Requires Java 17 or later
+
+
 ## 1.5.0 (2025-04-13)
 
 ### Deprecations
diff --git a/pom.xml b/pom.xml
index b831334..d0e1b45 100644
--- a/pom.xml
+++ b/pom.xml
@@ -110,7 +110,7 @@
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>3.14.0</version>
                     <configuration>
-                        <release>11</release>
+                        <release>17</release>
                     </configuration>
                 </plugin>
                 <plugin>
@@ -207,7 +207,7 @@
                                     <version>[3.6.3,)</version>
                                 </requireMavenVersion>
                                 <requireJavaVersion>
-                                    <version>[11,)</version>
+                                    <version>[17,)</version>
                                 </requireJavaVersion>
                             </rules>
                         </configuration>
@@ -253,7 +253,7 @@
                         <artifactId>maven-javadoc-plugin</artifactId>
                         <version>3.11.2</version>
                         <configuration>
-                            <source>11</source>
+                            <source>17</source>
                         </configuration>
                         <executions>
                             <execution>