diff --git a/pom.xml b/pom.xml
index 52945df..4cb526b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,35 +30,34 @@
 		<dependency>
 			<groupId>org.hibernate</groupId>
 			<artifactId>hibernate-core</artifactId>
-			<version>5.1.8.Final</version>
+			<version>4.3.11.Final</version>
+			<scope>provided</scope>
 		</dependency>
 
 		<!-- zusätzliche Erweiterungen. -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-jdbc</artifactId>
+			<version>${spring-version}</version>
+			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-web</artifactId>
+			<version>${spring-version}</version>
+			<scope>provided</scope>
+		</dependency>
 		<dependency>
 	        <groupId>com.fasterxml.jackson.core</groupId>
 	        <artifactId>jackson-databind</artifactId>
-	        <version>2.10.1</version>
-	    </dependency>
-	    <dependency>
-	      <groupId>org.springframework.boot</groupId>
-	      <artifactId>spring-boot-starter-web</artifactId>
-	      <version>2.2.1.RELEASE</version>
-	      <scope>compile</scope>
-	    </dependency>
-	    <dependency>
-	      <groupId>org.springframework</groupId>
-	      <artifactId>spring-tx</artifactId>
-	      <version>3.2.1.RELEASE</version>
+	        <version>2.12.2</version>
+			<scope>provided</scope>
 	    </dependency>
 		<dependency>
-		    <groupId>org.apache.logging.log4j</groupId>
-		    <artifactId>log4j-api</artifactId>
-		    <version>2.14.1</version>
-	  	</dependency>
-		<dependency>
-		    <groupId>org.apache.logging.log4j</groupId>
-		    <artifactId>log4j-core</artifactId>
-		    <version>2.14.1</version>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>1.7.2</version>
+			<scope>provided</scope>
 		</dependency>
         <dependency>
             <groupId>javax.xml.bind</groupId>
@@ -66,11 +65,6 @@
             <version>2.3.0</version>
             <scope>provided</scope>
         </dependency>
-      <dependency>
-         <groupId>org.springframework</groupId>
-         <artifactId>spring-jdbc</artifactId>
-         <version>5.3.14</version>
-      </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-csv</artifactId>