diff --git a/constants.properties b/constants.properties
index 63f4c9383b..d716006f66 100644
--- a/constants.properties
+++ b/constants.properties
@@ -24,7 +24,7 @@ jdkClassifier11=jdk11
 dockerJavaVersion=3.2.5
 proguardVersion=6.1.1
 // bouncy castle version must not be changed on a patch release. Needs a full release test cycle to flush out any issues.
-bouncycastleVersion=1.69
+bouncycastleVersion=1.70
 classgraphVersion=4.8.135
 disruptorVersion=3.4.2
 typesafeConfigVersion=1.3.4
diff --git a/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/SSLHelper.kt b/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/SSLHelper.kt
index 98910a673f..87e6a3e4cb 100644
--- a/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/SSLHelper.kt
+++ b/node-api/src/main/kotlin/net/corda/nodeapi/internal/protonwrapper/netty/SSLHelper.kt
@@ -19,8 +19,8 @@ import net.corda.nodeapi.internal.config.CertificateStore
 import net.corda.nodeapi.internal.crypto.toBc
 import net.corda.nodeapi.internal.crypto.x509
 import net.corda.nodeapi.internal.protonwrapper.netty.revocation.ExternalSourceRevocationChecker
+import org.bouncycastle.asn1.ASN1IA5String
 import org.bouncycastle.asn1.ASN1InputStream
-import org.bouncycastle.asn1.DERIA5String
 import org.bouncycastle.asn1.DEROctetString
 import org.bouncycastle.asn1.x509.AuthorityKeyIdentifier
 import org.bouncycastle.asn1.x509.CRLDistPoint
@@ -71,7 +71,7 @@ fun X509Certificate.distributionPoints() : Set<String>? {
 
     val dpNames = distPoint.distributionPoints.mapNotNull { it.distributionPoint }.filter { it.type == DistributionPointName.FULL_NAME }
     val generalNames = dpNames.flatMap { GeneralNames.getInstance(it.name).names.asList() }
-    return generalNames.filter { it.tagNo == GeneralName.uniformResourceIdentifier}.map { DERIA5String.getInstance(it.name).string }.toSet()
+    return generalNames.filter { it.tagNo == GeneralName.uniformResourceIdentifier}.map { ASN1IA5String.getInstance(it.name).string }.toSet()
 }
 
 fun X509Certificate.distributionPointsToString() : String {