diff --git a/modules/activiti-explorer/pom.xml b/modules/activiti-explorer/pom.xml
index 66ab2fa..761ff0f 100644
--- a/modules/activiti-explorer/pom.xml
+++ b/modules/activiti-explorer/pom.xml
@@ -24,7 +24,7 @@
   <repositories>
     <repository>
       <id>vaadin-addons</id>
-      <url>http://maven.vaadin.com/vaadin-addons</url>
+      <url>https://maven.vaadin.com/vaadin-addons</url>
     </repository>
   </repositories>
 
diff --git a/modules/activiti-modeler/pom.xml b/modules/activiti-modeler/pom.xml
index c84f655..c6d8492 100644
--- a/modules/activiti-modeler/pom.xml
+++ b/modules/activiti-modeler/pom.xml
@@ -25,7 +25,7 @@
     <repository>
       <id>maven-restlet</id>
       <name>Public online Restlet repository</name>
-      <url>http://maven.restlet.org</url>
+      <url>https://maven.restlet.org</url>
     </repository>
   </repositories>
 
diff --git a/modules/activiti-webapp-explorer2/pom.xml b/modules/activiti-webapp-explorer2/pom.xml
index 3d9fff4..5c4fbd9 100644
--- a/modules/activiti-webapp-explorer2/pom.xml
+++ b/modules/activiti-webapp-explorer2/pom.xml
@@ -21,7 +21,7 @@
   <repositories>
     <repository>
       <id>vaadin-addons</id>
-      <url>http://maven.vaadin.com/vaadin-addons</url>
+      <url>https://maven.vaadin.com/vaadin-addons</url>
     </repository>
   </repositories>