diff --git a/fathom-x509/pom.xml b/fathom-x509/pom.xml
index bda5acc..d2bc40f 100644
--- a/fathom-x509/pom.xml
+++ b/fathom-x509/pom.xml
@@ -24,7 +24,7 @@
     <modelVersion>4.0.0</modelVersion>
     
     <properties>
-      <bouncycastle.version>1.49</bouncycastle.version>
+      <bouncycastle.version>1.67</bouncycastle.version>
     </properties>
 
     <artifactId>fathom-x509</artifactId>