diff --git a/pom.xml b/pom.xml
index bb56bc4..efddf83 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,54 +27,49 @@
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
+            <dependency>
+                <groupId>org.apache.camel</groupId>
+                <artifactId>camel-bom</artifactId>
+                <version>${camel.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>log4j</groupId>
-            <artifactId>log4j</artifactId>
-            <version>1.2.17</version>
-        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>
-            <version>1.7.5</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-spring</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-core</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-servlet</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-sql</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-jaxb</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-http</artifactId>
-            <version>${camel.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
@@ -104,21 +99,12 @@
         <!-- Explicitly add JAXB dependencies. Needed for newer Java versions.
         See also https://stackoverflow.com/questions/43574426/how-to-resolve-java-lang-noclassdeffounderror-javax-xml-bind-jaxbexception-in-j
         -->
+        <!-- JAXB version corresponding to version used in Apache Camel -->
         <dependency>
             <groupId>javax.xml.bind</groupId>
             <artifactId>jaxb-api</artifactId>
             <version>${jaxb.version}</version>
         </dependency>
-        <dependency>
-            <groupId>com.sun.xml.bind</groupId>
-            <artifactId>jaxb-core</artifactId>
-            <version>${jaxb.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.sun.xml.bind</groupId>
-            <artifactId>jaxb-impl</artifactId>
-            <version>${jaxb.version}</version>
-        </dependency>
         <dependency>
             <groupId>javax.activation</groupId>
             <artifactId>activation</artifactId>
@@ -237,10 +223,10 @@
         </pluginManagement>
     </build>
     <properties>
-        <camel.version>2.24.0</camel.version>
+        <camel.version>2.24.3</camel.version>
         <jaxb.version>2.3.0</jaxb.version>
-        <spring.version>5.1.6.RELEASE</spring.version>
-        <spring-boot.version>2.1.4.RELEASE</spring-boot.version>
+        <spring.version>5.1.19.RELEASE</spring.version>
+        <spring-boot.version>2.1.18.RELEASE</spring-boot.version>
         <spring-framework.version>${spring.version}</spring-framework.version>
 
         <oai-pmh.base.url.external>http://localhost:8080/omdf</oai-pmh.base.url.external>