diff --git a/core/pom.xml b/core/pom.xml
index 74508ef..2a7ee3b 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -9,8 +9,8 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
     </properties>
diff --git a/demo/pom.xml b/demo/pom.xml
index e82b5fb..4322476 100644
--- a/demo/pom.xml
+++ b/demo/pom.xml
@@ -9,8 +9,8 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
     </properties>
diff --git a/impl/json/pom.xml b/impl/json/pom.xml
index 15d30d3..1239506 100644
--- a/impl/json/pom.xml
+++ b/impl/json/pom.xml
@@ -10,8 +10,8 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
     </properties>
diff --git a/impl/sql/pom.xml b/impl/sql/pom.xml
index d4307e1..69cb6c3 100644
--- a/impl/sql/pom.xml
+++ b/impl/sql/pom.xml
@@ -10,8 +10,8 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
 
diff --git a/impl/yaml/pom.xml b/impl/yaml/pom.xml
index 2f5f19d..bcb45f0 100644
--- a/impl/yaml/pom.xml
+++ b/impl/yaml/pom.xml
@@ -10,8 +10,8 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
     </properties>
diff --git a/pom.xml b/pom.xml
index d0b79e6..76d33c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,9 +5,9 @@
     <modelVersion>4.0.0</modelVersion>
 
     <properties>
-        <java.version>1.8</java.version>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <project.jdk.version>1.8</project.jdk.version>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
     </properties>
@@ -195,8 +195,8 @@
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>3.11.0</version>
                     <configuration>
-                        <source>${java.version}</source>
-                        <target>${java.version}</target>
+                        <source>${project.jdk.version}</source>
+                        <target>${project.jdk.version}</target>
                         <encoding>UTF-8</encoding>
                         <compilerArgument>-parameters</compilerArgument>
                     </configuration>