diff --git a/liquidjava-api/pom.xml b/liquidjava-api/pom.xml
index 88bbe565..d3a427df 100644
--- a/liquidjava-api/pom.xml
+++ b/liquidjava-api/pom.xml
@@ -65,8 +65,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.8.1</version>
 				<configuration>
-					<source>20</source>
-					<target>20</target>
+					<source>17</source>
+					<target>17</target>
 				</configuration>
 			</plugin>
 			
@@ -100,7 +100,7 @@
 				</executions>
 				<configuration>
 					<doclint>none</doclint>
-					<source>20</source>
+					<source>17</source>
 				</configuration>
 			</plugin>
 			
@@ -157,9 +157,9 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<javaVersion>20</javaVersion>
-		<maven.compiler.source>20</maven.compiler.source>
-		<maven.compiler.target>20</maven.compiler.target>
+		<javaVersion>17</javaVersion>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
 		<gpg.skip>true</gpg.skip>
 		<maven.deploy.skip>true</maven.deploy.skip>
 	</properties>
diff --git a/liquidjava-example/pom.xml b/liquidjava-example/pom.xml
index ef167bc6..f4196356 100644
--- a/liquidjava-example/pom.xml
+++ b/liquidjava-example/pom.xml
@@ -22,8 +22,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>${pVersion.compiler}</version>
 				<configuration>
-					<source>20</source>
-					<target>20</target>
+					<source>17</source>
+					<target>17</target>
 				</configuration>
 			</plugin>
 		</plugins>
@@ -31,8 +31,8 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<maven.compiler.source>20</maven.compiler.source>
-		<maven.compiler.target>20</maven.compiler.target>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
 		<!-- versions -->
 		<version.junit>4.13.1</version.junit>
 		<version.memcompiler>1.3.0</version.memcompiler>
diff --git a/liquidjava-verifier/pom.xml b/liquidjava-verifier/pom.xml
index af57236d..4ef47576 100644
--- a/liquidjava-verifier/pom.xml
+++ b/liquidjava-verifier/pom.xml
@@ -75,9 +75,9 @@
 					</execution>
 				</executions>
 				<configuration>
-					<compilerSource>20</compilerSource>
-					<compilerCompliance>20</compilerCompliance>
-					<compilerTargetPlatform>20</compilerTargetPlatform>
+					<compilerSource>17</compilerSource>
+					<compilerCompliance>17</compilerCompliance>
+					<compilerTargetPlatform>17</compilerTargetPlatform>
 				</configuration>
 			</plugin>
 			<plugin>
@@ -85,8 +85,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>${pVersion.compiler}</version>
 				<configuration>
-					<source>20</source>
-					<target>20</target>
+					<source>17</source>
+					<target>17</target>
 				</configuration>
 			</plugin>
 			<plugin>
@@ -168,7 +168,7 @@
 				</executions>
 				<configuration>
 					<doclint>none</doclint>
-					<source>20</source>
+					<source>17</source>
 				</configuration>
 			</plugin>
 			
@@ -225,9 +225,9 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<javaVersion>20</javaVersion>
-		<maven.compiler.source>20</maven.compiler.source>
-		<maven.compiler.target>20</maven.compiler.target>
+		<javaVersion>17</javaVersion>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
 		<!-- versions -->
 		<version.junit>5.10.0</version.junit>
 		<version.memcompiler>1.3.0</version.memcompiler>