diff --git a/packages/browser/src/fetch.ts b/packages/browser/src/fetch.ts
index b56007f..6872de4 100644
--- a/packages/browser/src/fetch.ts
+++ b/packages/browser/src/fetch.ts
@@ -58,9 +58,9 @@ export const fetch = (url: string, options: LightpandaFetchOptions = defaultOpti
       const executablePath = getExecutablePath()
       const flags = [
         { flag: `--dump ${dumpOptions?.type ?? 'html'}`, condition: dump },
-        { flag: '--insecure_disable_tls_host_verification', condition: disableHostVerification },
-        { flag: '--obey_robots', condition: obeyRobots },
-        { flag: `--http_proxy ${httpProxy}`, condition: httpProxy },
+        { flag: '--insecure-disable-tls-host-verification', condition: disableHostVerification },
+        { flag: '--obey-robots', condition: obeyRobots },
+        { flag: `--http-proxy ${httpProxy}`, condition: httpProxy },
       ]
         .map(f => (f.condition ? f.flag : ''))
         .join(' ')
diff --git a/packages/browser/src/serve.ts b/packages/browser/src/serve.ts
index 5762316..e4b0019 100644
--- a/packages/browser/src/serve.ts
+++ b/packages/browser/src/serve.ts
@@ -62,16 +62,16 @@ export const serve = (options: LightpandaServeOptions = defaultOptions) => {
       { flag: '--port', value: port },
       { flag: '--timeout', value: timeout },
       {
-        flag: '--insecure_disable_tls_host_verification',
+        flag: '--insecure-disable-tls-host-verification',
         value: disableHostVerification,
         flagOnly: true,
       },
       {
-        flag: '--obey_robots',
+        flag: '--obey-robots',
         value: obeyRobots,
         flagOnly: true,
       },
-      { flag: '--http_proxy', value: httpProxy },
+      { flag: '--http-proxy', value: httpProxy },
     ]
       .flatMap(f => (f.value ? [f.flag, !f.flagOnly ? f.value.toString() : ''] : ''))
       .filter(f => f !== '')