diff --git a/package-lock.json b/package-lock.json
index 17aa509..9a6d39d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -76,6 +76,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -323,6 +324,21 @@
         "y18n": "^4.0.0"
       },
       "dependencies": {
+        "ssri": {
+          "version": "6.0.1",
+          "resolved": "https://registry.npmjs.org/ssri/-/ssri-6.0.1.tgz",
+          "integrity": "sha512-3Wge10hNcT1Kur4PDFwEieXSCMCJs/7WvSACcrMYrNp+b8kDL1/0wJch5Ni2WrtwEa2IO8OsVfeKIciKCDx/QA==",
+          "requires": {
+            "figgy-pudding": "^3.5.1"
+          },
+          "dependencies": {
+            "figgy-pudding": {
+              "version": "3.5.2",
+              "resolved": "https://registry.npmjs.org/figgy-pudding/-/figgy-pudding-3.5.2.tgz",
+              "integrity": "sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw=="
+            }
+          }
+        },
         "y18n": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
@@ -2258,7 +2274,8 @@
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       "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
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-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "is-builtin-module": {
       "version": "1.0.0",
@@ -2506,6 +2523,7 @@
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-buffer": "^1.1.5"
       }
@@ -2613,7 +2631,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
       "version": "1.3.1",
@@ -3013,6 +3032,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -4172,7 +4192,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
@@ -6238,7 +6259,8 @@
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "repeating": {
       "version": "2.0.1",
@@ -6577,9 +6599,27 @@
       }
     },
     "ssri": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/ssri/-/ssri-6.0.0.tgz",
-      "integrity": "sha512-zYOGfVHPhxyzwi8MdtdNyxv3IynWCIM4jYReR48lqu0VngxgH1c+C6CmipRdJ55eVByTJV/gboFEEI7TEQI8DA=="
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
+      "integrity": "sha512-97qShzy1AiyxvPNIkLWoGua7xoQzzPjQ0HAH4B0rWKo7SZ6USuPcrUiAFrws0UH8RrbWmgq3LMTObhPIHbbBeQ==",
+      "requires": {
+        "minipass": "^3.1.1"
+      },
+      "dependencies": {
+        "minipass": {
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/minipass/-/minipass-3.1.3.tgz",
+          "integrity": "sha512-Mgd2GdMVzY+x3IJ+oHnVM+KG3lA5c8tnabyJKmHSaG2kAGpudxuOf8ToDkhumF7UzME7DecbQE9uOZhNm7PuJg==",
+          "requires": {
+            "yallist": "^4.0.0"
+          }
+        },
+        "yallist": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+          "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+        }
+      }
     },
     "stack-utils": {
       "version": "1.0.1",
diff --git a/package.json b/package.json
index cefe429..7e32fa8 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "node-fetch-npm": "^2.0.2",
     "promise-retry": "^1.1.1",
     "socks-proxy-agent": "^4.0.0",
-    "ssri": "^6.0.0"
+    "ssri": "^8.0.1"
   },
   "devDependencies": {
     "bluebird": "^3.5.1",