diff --git a/Benchmarking-your-changes.md b/Benchmarking-your-changes.md
index d8f30bc..4e100f8 100644
--- a/Benchmarking-your-changes.md
+++ b/Benchmarking-your-changes.md
@@ -21,8 +21,8 @@ When working on issues related to performance, it is important to provide a perf
 Run the following commands to create a 'baseline' measurement (i.e., before you make your changes):
 
     $ git checkout master
-    $ gulp generic
-    $ gulp components
+    $ npx gulp generic
+    $ npx gulp components
     $ cd test
     $ node test.mjs --statsFile=stats/results/baseline.json --statsDelay=5000 --manifestFile=benchmark.json
 
@@ -30,8 +30,8 @@ Then apply your changes and create a 'current' measurement (replace `<feature-br
 
     $ cd ..
     $ git checkout <feature-branch>
-    $ gulp generic
-    $ gulp components
+    $ npx gulp generic
+    $ npx gulp components
     $ cd test
     $ node test.mjs --statsFile=stats/results/current.json --statsDelay=5000 --manifestFile=benchmark.json
 
@@ -70,7 +70,7 @@ When the test finishes there will be a section in the terminal with `------- Sum
 #### Apply Your Changes & Test Again
 1. In the `<pdfjs_src_dir>`: 
    1. make your changes
-   2. build `gulp mozcentral`
+   2. run `npx gulp mozcentral`
    3. copy the pdf.js build to firefox `rsync -a -v <pdfjs_src_dir>/build/mozcentral/browser/extensions/pdfjs/ <firefox_src_dir>toolkit/components/pdfjs/`
 2. Back in `<firefox_src_dir>`:
    1. Build firefox `./mach build faster`