diff --git a/lib/permissions/minimally-encoded-thread-permissions.js b/lib/permissions/minimally-encoded-thread-permissions.js
--- a/lib/permissions/minimally-encoded-thread-permissions.js
+++ b/lib/permissions/minimally-encoded-thread-permissions.js
@@ -16,8 +16,6 @@
 // If more than 64 permissions are needed, the encoding in
 // `rolePermissionToBitmaskHex` will need to be updated to accommodate this.
 const baseRolePermissionEncoding = Object.freeze({
-  // TODO (atul): Update flow to `194.0.0` for bigint support
-  // $FlowIssue bigint-unsupported
   know_of: BigInt(0),
   visible: BigInt(1),
   voiced: BigInt(2),
@@ -62,8 +60,6 @@
   for (const [key, permission] of entries(permissions)) {
     if (permission.value && key in minimallyEncodedThreadPermissions) {
       invariant(
-        // TODO (atul): Update flow to `194.0.0` for bigint support
-        // $FlowIssue illegal-typeof
         typeof minimallyEncodedThreadPermissions[key] === 'bigint',
         'must be bigint',
       );
@@ -83,8 +79,6 @@
   }
   const permissionBitmask = minimallyEncodedThreadPermissions[permission];
   invariant(
-    // TODO (atul): Update flow to `194.0.0` for bigint support
-    // $FlowIssue illegal-typeof
     typeof permissionBitmask === 'bigint',
     'permissionBitmask must be of type bigint',
   );
@@ -130,11 +124,9 @@
   baseRolePermissionEncoding,
 );
 
-// $FlowIssue bigint-unsupported
 const inversePropagationPrefixes: Map<bigint, string> =
   invertObjectToMap(propagationPrefixes);
 
-// $FlowIssue bigint-unsupported
 const inverseFilterPrefixes: Map<bigint, string> =
   invertObjectToMap(filterPrefixes);
 
diff --git a/lib/utils/objects.test.js b/lib/utils/objects.test.js
--- a/lib/utils/objects.test.js
+++ b/lib/utils/objects.test.js
@@ -128,15 +128,11 @@
 
   it('should invert an object with BigInt values to map with BigInt keys', () => {
     const obj = {
-      // $FlowIssue bigint-unsupported
       key1: 1n,
-      // $FlowIssue bigint-unsupported
       key2: 2n,
     };
     const map = new Map();
-    // $FlowIssue bigint-unsupported
     map.set(1n, 'key1');
-    // $FlowIssue bigint-unsupported
     map.set(2n, 'key2');
     expect(invertObjectToMap(obj)).toEqual(map);
   });