diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5398146f45..4d352a4cb0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -113,7 +113,7 @@ jobs:
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
 
       - name: JS Build
-        run: sbt -jvm-opts ci/ci.jvmopts ++${{ matrix.scala }} scJS/fastOptJS
+        run: sbt -jvm-opts ci/ci.jvmopts ++${{ matrix.scala }} scJS/fullOptJS
 
       - name: Runs JS tests
         run: npm run test
diff --git a/sigma-js/jest.config.js b/sigma-js/jest.config.js
index 3c69644eec..79fa444dc3 100644
--- a/sigma-js/jest.config.js
+++ b/sigma-js/jest.config.js
@@ -3,8 +3,7 @@ const config = {
   transform: {}, // reduce non-cached test time by about 20x by disabling babel code transformation
   moduleDirectories: ["<rootDir>/node_modules"],
   moduleNameMapper: {
-    "sigmastate-js/main":
-      "<rootDir>/../sc/js/target/scala-2.13/sc-fastopt/main.js",
+    "sigmastate-js/main": "<rootDir>/../sc/js/target/scala-2.13/sc-opt/main.js",
   },
 };
 
diff --git a/sigma-js/package.json b/sigma-js/package.json
index b1ff6c4df7..31a0eb3f81 100644
--- a/sigma-js/package.json
+++ b/sigma-js/package.json
@@ -30,7 +30,7 @@
   "scripts": {
     "test": "jest",
     "clean": "shx rm -rf ./dist/*",
-    "copy-output": "shx mkdir -p ./dist/ && cp -r ../sc/js/target/scala-2.13/sc-fastopt/* ./dist/",
+    "copy-output": "shx mkdir -p ./dist/ && cp -r ../sc/js/target/scala-2.13/sc-opt/* ./dist/",
     "prepublishOnly": "npm run clean && npm run copy-output",
     "ci:snapshot": "node ./scripts/setSnapshotVersion"
   },