diff --git a/flake.nix b/flake.nix
index d28582af422..3ff578b3215 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,9 +19,8 @@
                 let
                   base = rec {
                     jdk =
-                      if javaVersion < 21 then prev."jdk${toString javaVersion}"
-                      else if javaVersion == 22 then jdk22-ea
-                      else jdk21;
+                      if javaVersion <= 21 then prev."jdk${toString javaVersion}"
+                      else jdk22-ea;
                     maven = prev.maven.override { inherit jdk; };
                   };
                   extra = with base; {
@@ -31,18 +30,6 @@
                 (if extraChecks then base // extra else base))
             ];
           };
-          jdk21 = pkgs.stdenv.mkDerivation rec {
-            name = "jdk21-oracle";
-            version = "21+35";
-            src = builtins.fetchTarball {
-              url = "https://download.oracle.com/java/21/archive/jdk-21_linux-x64_bin.tar.gz";
-              sha256 = "sha256:1snj1jxa5175r17nb6l2ldgkcvjbp5mbfflwcc923svgf0604ps4";
-            };
-            installPhase = ''
-              cd ..
-              mv $sourceRoot $out
-            '';
-          };
           jdk22-ea = pkgs.stdenv.mkDerivation rec {
             name = "jdk22-ea";
             version = "22+16";
@@ -198,18 +185,16 @@
           # We have additional options (currently EA jdks) on 64 bit linux systems
           blessedSystem = "x86_64-linux";
           blessed = rec {
-            jdk21 = mkShell blessedSystem { javaVersion = 21; };
             jdk22-ea = mkShell blessedSystem { javaVersion = 22; };
-            default = jdk21;
           };
           common = forAllSystems
             (system:
               rec {
-                default = jdk11;
+                default = jdk17;
                 jdk17 = mkShell system { javaVersion = 17; };
-                jdk11 = mkShell system { javaVersion = 11; };
-                extraChecks = mkShell system { extraChecks = true; javaVersion = 11; };
-                jReleaser = mkShell system { release = true; javaVersion = 11; };
+                jdk21 = mkShell system { javaVersion = 21; };
+                extraChecks = mkShell system { extraChecks = true; javaVersion = 21; };
+                jReleaser = mkShell system { release = true; javaVersion = 21; };
               });
         in
         common // { "${blessedSystem}" = common."${blessedSystem}" // blessed; };
diff --git a/jreleaser.yml b/jreleaser.yml
index d15436cdc45..ca213c505e2 100644
--- a/jreleaser.yml
+++ b/jreleaser.yml
@@ -16,7 +16,7 @@ project:
     homepage: https://spoon.gforge.inria.fr/
   java:
     groupId: fr.inria.gforge
-    version: "11"
+    version: "17"
   inceptionYear: "2015"
 
 release:
diff --git a/spoon-pom/pom.xml b/spoon-pom/pom.xml
index 99d7f22616e..165d74f4de4 100644
--- a/spoon-pom/pom.xml
+++ b/spoon-pom/pom.xml
@@ -25,7 +25,7 @@
     </modules>
 
     <properties>
-        <maven.compiler.release>11</maven.compiler.release>
+        <maven.compiler.release>17</maven.compiler.release>
         <runtime.log>target/velocity.log</runtime.log>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.build.outputTimestamp>1696689792</project.build.outputTimestamp>
diff --git a/src/main/java/spoon/metamodel/Metamodel.java b/src/main/java/spoon/metamodel/Metamodel.java
index c42c92b99b1..703f9b59080 100644
--- a/src/main/java/spoon/metamodel/Metamodel.java
+++ b/src/main/java/spoon/metamodel/Metamodel.java
@@ -410,6 +410,7 @@ private static Factory createFactory(File spoonJavaSourcesDirectory) {
 		final Launcher launcher = new Launcher();
 		launcher.getEnvironment().setNoClasspath(true);
 		launcher.getEnvironment().setCommentEnabled(true);
+		launcher.getEnvironment().setComplianceLevel(17);
 //		// Spoon model interfaces
 		Arrays.asList("spoon/reflect/code",
 				"spoon/reflect/declaration",
diff --git a/src/main/java/spoon/testing/utils/ModelUtils.java b/src/main/java/spoon/testing/utils/ModelUtils.java
index 8f76e7c0b39..a54166d3199 100644
--- a/src/main/java/spoon/testing/utils/ModelUtils.java
+++ b/src/main/java/spoon/testing/utils/ModelUtils.java
@@ -26,7 +26,9 @@ private ModelUtils() {
 	}
 
 	public static Factory createFactory() {
-		return new FactoryImpl(new DefaultCoreFactory(), new StandardEnvironment());
+		StandardEnvironment environment = new StandardEnvironment();
+		environment.setComplianceLevel(17);
+		return new FactoryImpl(new DefaultCoreFactory(), environment);
 	}
 
 	/** Utility method for testing: creates the model of `packageName` from src/test/java and returns the CtType corresponding to `className` */