diff --git a/yubikey-ca-java/src/main/java/me/hatter/tools/yubikeyca/YubikeyCaMain.java b/yubikey-ca-java/src/main/java/me/hatter/tools/yubikeyca/YubikeyCaMain.java
index cb94f11..1abbaea 100644
--- a/yubikey-ca-java/src/main/java/me/hatter/tools/yubikeyca/YubikeyCaMain.java
+++ b/yubikey-ca-java/src/main/java/me/hatter/tools/yubikeyca/YubikeyCaMain.java
@@ -6,6 +6,7 @@ import me.hatter.tools.commons.io.RFile;
 import me.hatter.tools.commons.log.LogConfig;
 import me.hatter.tools.commons.log.LogTool;
 import me.hatter.tools.commons.log.LogTools;
+import me.hatter.tools.commons.security.bc.BCUtil;
 import me.hatter.tools.commons.security.cert.X509CertUtil;
 import me.hatter.tools.commons.security.key.KeyPairTool;
 import me.hatter.tools.commons.security.key.KeyUtil;
@@ -30,6 +31,7 @@ public class YubikeyCaMain {
     private static final LogTool log;
 
     static {
+        BCUtil.initBc();
         LogConfig.initMuteInfoMode();
         log = LogTools.getLogTool(YubikeyCaMain.class);
     }