diff --git a/Project.toml b/Project.toml
index 5de9585..739817e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -2,7 +2,7 @@ name = "CodecZlib"
 uuid = "944b1d66-785c-5afd-91f1-9de20f533193"
 license = "MIT"
 authors = ["Kenta Sato <bicycle1885@gmail.com>"]
-version = "0.7.3"
+version = "0.7.4"
 
 [deps]
 TranscodingStreams = "3bb67fe8-82b1-5028-8e26-92a6c54297fa"
@@ -14,6 +14,7 @@ julia = "1.3"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
 [targets]
-test = ["Test"]
+test = ["Test", "Random"]
diff --git a/test/runtests.jl b/test/runtests.jl
index 7f834a9..251cdc3 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,4 +1,5 @@
 using CodecZlib
+using Random
 using Test
 import TranscodingStreams:
     TranscodingStreams,