diff --git a/Cargo.toml b/Cargo.toml
index 39d177e..ba24fc9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ test = true
 
 [dependencies]
 num-traits = { version = ">=0.2.0", default-features = false }
-lazy_static = ">0.0.0"
+lazy_static = { version = ">0.0.0", optional = true }
 log = { version = ">=0.0.0", default-features = false }
 cfg-if = ">0.0.0"
 
@@ -28,9 +28,9 @@ rand = ">=0.6.5"
 [features]
 default = [ "std", "bzip2", "gzip", "deflate", "zlib", "lzss" ]
 all = [ "bzip2", "gzip", "deflate", "zlib", "lzhuf", "lzss" ]
-bzip2 = [ ]
+bzip2 = [ "lazy_static" ]
 lzhuf = [ "lzss" ]
-gzip = [ "deflate" ]
+gzip = [ "deflate", "lazy_static" ]
 deflate = [ "lzss" ]
 zlib = [ "deflate" ]
 lzss = [ ]