diff --git a/src/keys/rsa-class.js b/src/keys/rsa-class.js
index 1046eba..bc9289a 100644
--- a/src/keys/rsa-class.js
+++ b/src/keys/rsa-class.js
@@ -31,7 +31,7 @@ class RsaPublicKey {
     })
   }
 
-  async encrypt (bytes) {
+  encrypt (bytes) {
     return crypto.encrypt(this._key, bytes)
   }
 
@@ -68,7 +68,7 @@ class RsaPrivateKey {
     return new RsaPublicKey(this._publicKey)
   }
 
-  async decrypt (bytes) {
+  decrypt (bytes) {
     return crypto.decrypt(this._key, bytes)
   }
 
diff --git a/src/keys/rsa.js b/src/keys/rsa.js
index f7c0b35..3557e3c 100644
--- a/src/keys/rsa.js
+++ b/src/keys/rsa.js
@@ -69,10 +69,10 @@ exports.hashAndVerify = async function (key, sig, msg) { // eslint-disable-line
   return verify.verify(pem, sig)
 }
 
-exports.encrypt = async function (key, bytes) {
+exports.encrypt = function (key, bytes) {
   return crypto.publicEncrypt(jwkToPem(key), bytes)
 }
 
-exports.decrypt = async function (key, bytes) {
+exports.decrypt = function (key, bytes) {
   return crypto.privateDecrypt(jwkToPem(key), bytes)
 }