diff --git a/acme4j-utils/pom.xml b/acme4j-utils/pom.xml
index 47548de5..0d932192 100644
--- a/acme4j-utils/pom.xml
+++ b/acme4j-utils/pom.xml
@@ -53,7 +53,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk15on</artifactId>
-            <version>${bouncycastle.version}</version>
+            <version>${bouncycastle.version}.01</version>
         </dependency>
         <dependency>
             <groupId>org.bouncycastle</groupId>
diff --git a/pom.xml b/pom.xml
index bf1488b2..0a1988f8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -51,10 +51,10 @@
     </developers>
 
     <properties>
-        <bouncycastle.version>1.64</bouncycastle.version>
-        <httpclient.version>4.5.10</httpclient.version>
-        <jose4j.version>0.7.0</jose4j.version>
-        <slf4j.version>1.7.29</slf4j.version>
+        <bouncycastle.version>1.65</bouncycastle.version>
+        <httpclient.version>4.5.12</httpclient.version>
+        <jose4j.version>0.7.1</jose4j.version>
+        <slf4j.version>1.7.30</slf4j.version>
         <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>utf-8</project.reporting.outputEncoding>
     </properties>
@@ -185,13 +185,13 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest</artifactId>
-            <version>2.1</version>
+            <version>2.2</version>
             <scope>test</scope>
         </dependency>
 
@@ -204,13 +204,13 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>2.23.4</version>
+            <version>3.3.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.awaitility</groupId>
             <artifactId>awaitility</artifactId>
-            <version>3.1.5</version>
+            <version>4.0.3</version>
             <scope>test</scope>
         </dependency>
     </dependencies>