diff --git a/pom.xml b/pom.xml
index 5d3c97b14..059a56732 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,7 +35,7 @@
         <commons-io.version>2.1</commons-io.version>
         <joda-time.version>2.2</joda-time.version>
         <joda-convert.version>1.7</joda-convert.version>
-        <org.slf4j.version>1.7.1</org.slf4j.version>
+        <org.slf4j.version>1.7.26</org.slf4j.version>
         <osgi.version>5.0.0</osgi.version>
         <shiro.version>1.2.3</shiro.version>
         <org.geotools.version>8.4</org.geotools.version>
diff --git a/security/pdp/sample-xacml/pom.xml b/security/pdp/sample-xacml/pom.xml
index cf0349935..d441e111d 100644
--- a/security/pdp/sample-xacml/pom.xml
+++ b/security/pdp/sample-xacml/pom.xml
@@ -46,7 +46,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-ext</artifactId>
-            <version>1.7.12</version>
+            <version>1.7.26</version>
         </dependency>
     </dependencies>