diff --git a/src/persist/fileSystem.ts b/src/persist/fileSystem.ts
index 6d433ab..736184b 100644
--- a/src/persist/fileSystem.ts
+++ b/src/persist/fileSystem.ts
@@ -1,4 +1,3 @@
-import { Buffer } from 'buffer';
 export interface FileSystem {
   readFileSync(path: string, encoding?: string): Buffer | string;
   writeFileSync(path: string, text: string, encoding?: string): void;
diff --git a/src/util/ip.ts b/src/util/ip.ts
index 3f0975c..855055d 100644
--- a/src/util/ip.ts
+++ b/src/util/ip.ts
@@ -26,7 +26,7 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-import { Buffer } from 'buffer';
+import { Buffer } from 'buffer/';
 
 const ipv4Regex = /^(\d{1,3}\.){3,3}\d{1,3}$/;
 const ipv6Regex = /^(::)?(((\d{1,3}\.){3}(\d{1,3}){1})?([0-9a-f]){0,4}:{0,2}){1,8}(::)?$/i;