diff --git a/sketches/package-lock.json b/sketches/package-lock.json
new file mode 100644
index 0000000..19d8169
--- /dev/null
+++ b/sketches/package-lock.json
@@ -0,0 +1,17 @@
+{
+  "name": "sketches",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "papaparse": "^5.4.1"
+      }
+    },
+    "node_modules/papaparse": {
+      "version": "5.4.1",
+      "resolved": "https://registry.npmjs.org/papaparse/-/papaparse-5.4.1.tgz",
+      "integrity": "sha512-HipMsgJkZu8br23pW15uvo6sib6wne/4woLZPlFf3rpDyMe9ywEXUsuD7+6K9PRkJlVT51j/sCOYDKGGS3ZJrw=="
+    }
+  }
+}
diff --git a/sketches/package.json b/sketches/package.json
new file mode 100644
index 0000000..96fc6cc
--- /dev/null
+++ b/sketches/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "papaparse": "^5.4.1"
+  }
+}
diff --git a/sketches/simulator-sketch-v2.js b/sketches/simulator-sketch-v2.js
index f8300a2..395197d 100644
--- a/sketches/simulator-sketch-v2.js
+++ b/sketches/simulator-sketch-v2.js
@@ -201,8 +201,8 @@ function logCPUState() {
 
 // FUNCTIONS FOR DISPLAYING DATA
 
-function num2hex(num) { num.toString(16) };
-function hex2num(hex) { parseInt(hex, 16) };
+function num2hex(num) { return num.toString(16) };
+function hex2num(hex) { return parseInt(hex, 16) };
 
 logTableTitled = (memory, tableTitle) => {
   console.log();