diff --git a/lib/make/crypto.js b/lib/make/crypto.js
index 35b1ea3..be645c4 100644
--- a/lib/make/crypto.js
+++ b/lib/make/crypto.js
@@ -194,7 +194,7 @@ make.crypto = {
         return this.alg()
       },
       presets: {
-        raw: null,
+        raw: {},
         jwk: [
           {
             kty: 'RSA',
@@ -256,7 +256,7 @@ make.crypto = {
         return this.alg()
       },
       presets: {
-        raw: null,
+        raw: {},
         jwk: [
           {
             kty: 'RSA',
@@ -329,7 +329,7 @@ make.crypto = {
         return this.alg()
       },
       presets: {
-        raw: null,
+        raw: {},
         jkw: [
           {
             kty: 'RSA',
@@ -390,7 +390,7 @@ make.crypto = {
         return this.alg()
       },
       presets: {
-        raw: null,
+        raw: {},
         jwk: [
           {
             kty: 'EC',
@@ -446,7 +446,7 @@ make.crypto = {
         )
       },
       presets: {
-        raw: null,
+        raw: {},
         jwk: [
           {
             kty: 'EC',
@@ -519,8 +519,8 @@ make.crypto = {
             ext: true
           }
         ],
-        spki: null,
-        pkcs8: null
+        spki: {},
+        pkcs8: {}
       }
     },
     'AES-CBC': {
@@ -581,8 +581,8 @@ make.crypto = {
             ext: true
           }
         ],
-        spki: null,
-        pkcs8: null
+        spki: {},
+        pkcs8: {}
       }
     },
     'AES-GCM': {
@@ -646,8 +646,8 @@ make.crypto = {
             ext: true
           }
         ],
-        spki: null,
-        pkcs8: null
+        spki: {},
+        pkcs8: {}
       }
     },
     'AES-KW': {
@@ -694,8 +694,8 @@ make.crypto = {
             ext: true
           }
         ],
-        spki: null,
-        pkcs8: null
+        spki: {},
+        pkcs8: {}
       }
     },
     'HMAC': {
@@ -738,8 +738,8 @@ make.crypto = {
           alg: 'HS256',
           ext: true
         },
-        spki: null,
-        pkcs8: null
+        spki: {},
+        pkcs8: {}
       }
     },
     'HKDF': {
@@ -813,9 +813,9 @@ make.crypto = {
       },
       presets: {
         raw: crypto.getRandomValues(new Uint8Array(16)),
-        jwk: null,
-        spki: null,
-        pkcs8: null
+        jwk: {},
+        spki: {},
+        pkcs8: {}
       }
     },
     'DH': {
@@ -853,10 +853,10 @@ make.crypto = {
         )
       },
       presets: {
-        raw: null,
-        jwk: null,
-        spki: null,
-        pkcs8: null
+        raw: {},
+        jwk: {},
+        spki: {},
+        pkcs8: {}
       }
     }
   },