diff --git a/package-lock.json b/package-lock.json
index 1d8cd98f8..5eab539ee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3175,9 +3175,9 @@
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-      "resolved": "https://registry.npmjs.org/@stencila/executa/-/executa-1.15.3.tgz",
-      "integrity": "sha512-8Ug8gSWOBHLbZqyjGdqvU21xLCyVWH4ZG9iIFKMa4TEaWajvmaOOjssCo96wp3nTUdJoAWckTEkXr3ZFXq4e3g==",
+      "version": "1.15.4",
+      "resolved": "https://registry.npmjs.org/@stencila/executa/-/executa-1.15.4.tgz",
+      "integrity": "sha512-wa6F95XKo9n1+KoqIOXNJSQG7u201n1RooeTAAbzB39YY78j9g8HUjnCU2k2qLb3qJ82irv6Jd32w5pTWio4Ng==",
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@@ -3185,10 +3185,10 @@
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         "ajv": "^6.12.6",
         "chalk": "^4.1.0",
-        "cli-highlight": "^2.1.8",
+        "cli-highlight": "^2.1.9",
         "cross-fetch": "^3.0.6",
         "external-ip": "^2.3.1",
-        "fastify": "^3.8.0",
+        "fastify": "^3.9.1",
         "fastify-cors": "^5.0.0",
         "fastify-jwt": "^2.1.3",
         "fastify-static": "^3.3.0",
@@ -3198,11 +3198,11 @@
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         "length-prefixed-stream": "^2.0.0",
         "mkdirp": "^1.0.4",
-        "nanoid": "^3.1.18",
+        "nanoid": "^3.1.20",
         "ora": "^5.1.0",
         "p-retry": "^4.2.0",
         "split2": "^3.2.2",
-        "ws": "^7.4.0"
+        "ws": "^7.4.1"
       },
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@@ -3272,9 +3272,9 @@
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-          "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.0.tgz",
-          "integrity": "sha512-kyFwXuV/5ymf+IXhS6f0+eAFvydbaBW3zjpT6hUdAh/hbVjTIB5EHBGi0bPoCLSK2wcuz3BrEkB9LrYv1Nm4NQ=="
+          "version": "7.4.1",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.1.tgz",
+          "integrity": "sha512-pTsP8UAfhy3sk1lSk/O/s4tjD0CRwvMnzvwr4OKGX7ZvqZtUyx4KIJB5JWbkykPoc55tixMGgTNoh3k4FkNGFQ=="
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@@ -5719,9 +5719,9 @@
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-      "version": "2.1.8",
-      "resolved": "https://registry.npmjs.org/cli-highlight/-/cli-highlight-2.1.8.tgz",
-      "integrity": "sha512-mFuTW5UOV3/S0wZE9/1b0EcAM0XOJIhoAWPhWm5voiJ6ugVBkvYBIEL7sbHo9sEtWdEmwDIWab32qpaRI3cfqQ==",
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/cli-highlight/-/cli-highlight-2.1.9.tgz",
+      "integrity": "sha512-t8RNIZgiI24i/mslZ8XT8o660RUj5ZbUJpEZrZa/BNekTzdC2LfMRAnt0Y7sgzNM4FGW5tmWg/YnbTH8o1eIOQ==",
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         "chalk": "^4.0.0",
         "highlight.js": "^10.0.0",
@@ -9641,9 +9641,9 @@
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     "fastify": {
-      "version": "3.8.0",
-      "resolved": "https://registry.npmjs.org/fastify/-/fastify-3.8.0.tgz",
-      "integrity": "sha512-w57/uvyQWzF/KSr9CbWQ5nfTqSSfYcmrems9Lc3VvtrAF7EsLbfZQBQZul6xwvE1uEfxA4nGdoUKqpU7xiv7cw==",
+      "version": "3.9.1",
+      "resolved": "https://registry.npmjs.org/fastify/-/fastify-3.9.1.tgz",
+      "integrity": "sha512-J+JyYc2PH7N6KxrG0d3d2V0HRPdBMpxp3eKdGcDtemTvXhuQKFHFLQ+WkeFLShkcGDsf+/vBV+NMK8Ki97/OTg==",
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         "ajv": "^6.12.2",
@@ -9663,6 +9663,14 @@
         "tiny-lru": "^7.0.0"
       },
       "dependencies": {
+        "lru-cache": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+          "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+          "requires": {
+            "yallist": "^4.0.0"
+          }
+        },
         "readable-stream": {
           "version": "3.6.0",
           "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
@@ -9674,9 +9682,17 @@
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         "semver": {
-          "version": "7.3.2",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
-          "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ=="
+          "version": "7.3.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.4.tgz",
+          "integrity": "sha512-tCfb2WLjqFAtXn4KEdxIhalnRtoKFN7nAwj0B3ZXCbQloV2tq5eDbcTmT68JJD3nRJq24/XgxtQKFIpQdtvmVw==",
+          "requires": {
+            "lru-cache": "^6.0.0"
+          }
+        },
+        "yallist": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+          "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
         }
       }
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@@ -15909,9 +15925,9 @@
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-      "version": "3.1.18",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.18.tgz",
-      "integrity": "sha512-rndlDjbbHbcV3xi+R2fpJ+PbGMdfBxz5v1fATIQFq0DP64FsicQdwnKLy47K4kZHdRpmQXtz24eGsxQqamzYTA=="
+      "version": "3.1.20",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.20.tgz",
+      "integrity": "sha512-a1cQNyczgKbLX9jwbS/+d7W8fX/RfgYR7lVWwWOGIPNgK2m0MWvrGF6/m4kk6U3QcFMnZf3RIhL0v2Jgh/0Uxw=="
     },
     "nanomatch": {
       "version": "1.2.13",
diff --git a/package.json b/package.json
index eaa240bfd..ff753eaec 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "url": "https://github.com/stencila/encoda/issues"
   },
   "dependencies": {
-    "@stencila/executa": "^1.15.3",
+    "@stencila/executa": "^1.15.4",
     "@stencila/logga": "^3.0.1",
     "@stencila/schema": "^0.47.2",
     "@stencila/thema": "^2.20.4",