diff --git a/Cargo.toml b/Cargo.toml
index d209beae..5dd25100 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,13 +12,13 @@ license = "MIT"
 edition = '2018'
 
 [dependencies]
-bitflags = "1.1.0"
+bitflags = "1.2.1"
 libc = "0.2"
-x86 = { version = "0.19.0", features = ["performance-counter"] }
+x86 = { version = "0.33.0", features = ["performance-counter"] }
 mmap = "0.1.*"
-byteorder = "1.3.1"
+byteorder = "1.3.4"
 nom = "4.2.3"
-phf = "0.7.23"
+phf = "0.8.0"
 
 [[bin]]
 name = "perfcnt-list"