diff --git a/benchmarks/Gemfile.lock b/benchmarks/Gemfile.lock
index 0e35cf3..86bfdb2 100644
--- a/benchmarks/Gemfile.lock
+++ b/benchmarks/Gemfile.lock
@@ -1,10 +1,10 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    benchmark-ips (2.10.0)
+    benchmark-ips (2.13.0)
     lz4-ruby (0.3.3)
     ruby-xz (1.0.3)
-    snappy (0.3.0)
+    snappy (0.4.0)
 
 PLATFORMS
   ruby
@@ -16,4 +16,4 @@ DEPENDENCIES
   snappy
 
 BUNDLED WITH
-   2.1.4
+   2.5.7
diff --git a/benchmarks/results/city.json.gzip b/benchmarks/results/city.json.gzip
index 4cf5d2c..72912e2 100644
Binary files a/benchmarks/results/city.json.gzip and b/benchmarks/results/city.json.gzip differ
diff --git a/benchmarks/results/city.json.lz4 b/benchmarks/results/city.json.lz4
index 1c42856..d9d2c19 100644
Binary files a/benchmarks/results/city.json.lz4 and b/benchmarks/results/city.json.lz4 differ