diff --git a/build.gradle b/build.gradle
index f9311ae9..e314ee69 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,15 +40,15 @@ repositories {
 
 configurations.compile.transitive = false
 
-def bouncycastleVersion = "1.67"
+def bouncycastleVersion = "1.68"
 def sshdVersion = "2.1.0"
 
 dependencies {
-  implementation "org.slf4j:slf4j-api:1.7.7"
+  implementation "org.slf4j:slf4j-api:1.7.30"
   implementation "org.bouncycastle:bcprov-jdk15on:$bouncycastleVersion"
   implementation "org.bouncycastle:bcpkix-jdk15on:$bouncycastleVersion"
   implementation "com.jcraft:jzlib:1.1.3"
-  implementation "com.hierynomus:asn-one:0.4.0"
+  implementation "com.hierynomus:asn-one:0.5.0"
 
   implementation "net.i2p.crypto:eddsa:0.3.0"