diff --git a/.eslintrc.yaml b/.eslintrc.yaml
index a06f1d76..96931d55 100644
--- a/.eslintrc.yaml
+++ b/.eslintrc.yaml
@@ -23,6 +23,7 @@ rules:
   no-dupe-class-members: off
   "@typescript-eslint/no-use-before-define": off
   "@typescript-eslint/no-non-null-assertion": off
+  eqeqeq: error
 
 settings:
   # Does not work with CommonJS unfortunately.
diff --git a/src/node/cli.ts b/src/node/cli.ts
index e3072b1d..e900fdff 100644
--- a/src/node/cli.ts
+++ b/src/node/cli.ts
@@ -172,7 +172,7 @@ export const parse = (
     const arg = argv[i]
 
     // -- signals the end of option parsing.
-    if (!ended && arg == "--") {
+    if (!ended && arg === "--") {
       ended = true
       continue
     }
@@ -220,7 +220,7 @@ export const parse = (
         throw error(`--${key} requires a value`)
       }
 
-      if (option.type == OptionalString && value == "false") {
+      if (option.type === OptionalString && value === "false") {
         continue
       }