diff --git a/Cargo.toml b/Cargo.toml
index 1a7abfd..87be3d7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,9 +11,16 @@ description = "Fast integer compression/decompression via SIMD bit-packing. Port
 crunchy = "0.2.2"
 
 [dev-dependencies]
-rand = "0.6"
+rand = "0.7"
 criterion = "0.2"
 
+[features]
+bitpacker1x = []
+bitpacker4x = []
+bitpacker8x = []
+
+default = ["bitpacker1x", "bitpacker4x", "bitpacker8x", ]
+
 [[bench]]
 name = "bitpacking_bench"
 path = "src/bitpacking_bench.rs"
diff --git a/src/lib.rs b/src/lib.rs
index 6fa3e4d..0617baa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -264,10 +264,16 @@ fn most_significant_bit(v: u32) -> u8 {
     }
 }
 
+#[cfg(feature = "bitpacker1x")]
 mod bitpacker1x;
+#[cfg(feature = "bitpacker4x")]
 mod bitpacker4x;
+#[cfg(feature = "bitpacker8x")]
 mod bitpacker8x;
 
+#[cfg(feature = "bitpacker1x")]
 pub use bitpacker1x::BitPacker1x;
+#[cfg(feature = "bitpacker4x")]
 pub use bitpacker4x::BitPacker4x;
+#[cfg(feature = "bitpacker8x")]
 pub use bitpacker8x::BitPacker8x;