diff --git a/.changeset/use-latest-tajriba.md b/.changeset/use-latest-tajriba.md
new file mode 100644
index 00000000..68ecda94
--- /dev/null
+++ b/.changeset/use-latest-tajriba.md
@@ -0,0 +1,5 @@
+---
+"@empirica/core": patch
+---
+
+Upgrade tajriba.js to version 1.5.0.
diff --git a/lib/@empirica/core/package.json b/lib/@empirica/core/package.json
index 88f76be4..4688ab42 100644
--- a/lib/@empirica/core/package.json
+++ b/lib/@empirica/core/package.json
@@ -191,7 +191,7 @@
     "unocss": "0.51.4"
   },
   "dependencies": {
-    "@empirica/tajriba": "1.4.0",
+    "@empirica/tajriba": "1.5.0",
     "@swc/helpers": "0.4.2",
     "@unocss/reset": "^0.51.4",
     "archiver": "5.3.1",
diff --git a/package-lock.json b/package-lock.json
index 578d59d4..f69a4c63 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -87,10 +87,10 @@
       }
     },
     "lib/@empirica/core": {
-      "version": "1.8.5",
+      "version": "1.8.6",
       "license": "Apache-2.0",
       "dependencies": {
-        "@empirica/tajriba": "1.4.0",
+        "@empirica/tajriba": "1.5.0",
         "@swc/helpers": "0.4.2",
         "@unocss/reset": "^0.51.4",
         "archiver": "5.3.1",
@@ -685,11 +685,12 @@
       "link": true
     },
     "node_modules/@empirica/tajriba": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/@empirica/tajriba/-/tajriba-1.4.0.tgz",
-      "integrity": "sha512-KCeoj7/i5s/8n2NuwtaRz1H2C6S0CtgwOo1mMJzDGMOc0jxmC1gKnSCy4XSb8C9bBtPp/lm0RDukwIB9MzTWlg==",
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@empirica/tajriba/-/tajriba-1.5.0.tgz",
+      "integrity": "sha512-6YxjnSmCGkD7GwzVlJU200UPUxOzY7BxBaTz2/EWz2ePS8VWNBk28fK/vdqxIb/5gOgQZIBrRSRtZFixxHAv+w==",
       "dependencies": {
         "@urql/core": "2.5.0",
+        "cross-fetch": "4.0.0",
         "graphql": "16.5.0",
         "graphql-tag": "2.12.6",
         "graphql-ws": "5.9.0",
@@ -3728,6 +3729,14 @@
       "integrity": "sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==",
       "dev": true
     },
+    "node_modules/cross-fetch": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-4.0.0.tgz",
+      "integrity": "sha512-e4a5N8lVvuLgAWgnCrLr2PP0YyDOTHa9H/Rj54dirp61qXnNq46m82bRhNqIA5VccJtWBvPTFRV3TtvHUKPB1g==",
+      "dependencies": {
+        "node-fetch": "^2.6.12"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -8249,12 +8258,50 @@
         "@sinonjs/commons": "^2.0.0"
       }
     },
+    "node_modules/node-fetch": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.7.0.tgz",
+      "integrity": "sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A==",
+      "dependencies": {
+        "whatwg-url": "^5.0.0"
+      },
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      },
+      "peerDependencies": {
+        "encoding": "^0.1.0"
+      },
+      "peerDependenciesMeta": {
+        "encoding": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/node-fetch-native": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/node-fetch-native/-/node-fetch-native-1.1.0.tgz",
       "integrity": "sha512-nl5goFCig93JZ9FIV8GHT9xpNqXbxQUzkOmKIMKmncsBH9jhg7qKex8hirpymkBFmNQ114chEEG5lS4wgK2I+Q==",
       "dev": true
     },
+    "node_modules/node-fetch/node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw=="
+    },
+    "node_modules/node-fetch/node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ=="
+    },
+    "node_modules/node-fetch/node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "node_modules/node-gyp-build": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.6.0.tgz",