diff --git a/src/main/java/org/asamk/signal/util/SecurityProvider.java b/src/main/java/org/asamk/signal/util/SecurityProvider.java
index 9177a781..043a7894 100644
--- a/src/main/java/org/asamk/signal/util/SecurityProvider.java
+++ b/src/main/java/org/asamk/signal/util/SecurityProvider.java
@@ -15,11 +15,11 @@ public class SecurityProvider extends Provider {
         put("SecureRandom.DEFAULT", DefaultRandom.class.getName());
 
         // Workaround for BKS truststore
-        put("KeyStore.BKS", "org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi$Std");
-        put("KeyStore.BKS-V1", "org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi$Version1");
-        put("KeyStore.BouncyCastle", "org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi$BouncyCastleStore");
-        put("KeyFactory.X.509", "org.bouncycastle.jcajce.provider.asymmetric.x509.KeyFactory");
-        put("CertificateFactory.X.509", "org.bouncycastle.jcajce.provider.asymmetric.x509.CertificateFactory");
+        put("KeyStore.BKS", org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi.Std.class.getCanonicalName());
+        put("KeyStore.BKS-V1", org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi.Version1.class.getCanonicalName());
+        put("KeyStore.BouncyCastle", org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi.BouncyCastleStore.class.getCanonicalName());
+        put("KeyFactory.X.509", org.bouncycastle.jcajce.provider.asymmetric.x509.KeyFactory.class.getCanonicalName());
+        put("CertificateFactory.X.509", org.bouncycastle.jcajce.provider.asymmetric.x509.CertificateFactory.class.getCanonicalName());
     }
 
     public static class DefaultRandom extends SecureRandomSpi {