diff --git a/pom.xml b/pom.xml
index 748ee6a..f69ebd6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,43 +29,43 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
+            <version>1.7.25</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>${log4j.version}</version>
+            <version>2.12.4</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-api</artifactId>
-            <version>${log4j.version}</version>
+            <version>2.11.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-slf4j-impl</artifactId>
-            <version>${log4j.version}</version>
+            <version>2.12.4</version>
         </dependency>
 
         <!-- Jsoup -->
         <dependency>
             <groupId>org.jsoup</groupId>
             <artifactId>jsoup</artifactId>
-            <version>${jsoup.version}</version>
+            <version>1.15.3</version>
         </dependency>
 
         <!-- Schema.org -->
         <dependency>
             <groupId>com.github.mautini</groupId>
             <artifactId>schemaorg-java</artifactId>
-            <version>${schemaorg-java.version}</version>
+            <version>1.0.1</version>
         </dependency>
 
         <!-- Junit -->
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
-            <version>${junit.version}</version>
+            <version>5.2.0</version>
         </dependency>
 
         <!-- Utils -->