diff --git a/Cargo.lock b/Cargo.lock
index b90bcfc7f2f44..9047e0489a598 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3379,7 +3379,7 @@ dependencies = [
  "rustc_llvm",
  "rustc_session",
  "rustc_target",
- "smallvec 0.6.10",
+ "smallvec 1.0.0",
  "syntax",
  "syntax_expand",
  "syntax_pos",
diff --git a/src/librustc_codegen_llvm/Cargo.toml b/src/librustc_codegen_llvm/Cargo.toml
index 71cfacfa56058..11426b056fb5d 100644
--- a/src/librustc_codegen_llvm/Cargo.toml
+++ b/src/librustc_codegen_llvm/Cargo.toml
@@ -28,7 +28,7 @@ rustc_index = { path = "../librustc_index" }
 rustc_llvm = { path = "../librustc_llvm" }
 rustc_session = { path = "../librustc_session" }
 rustc_target = { path = "../librustc_target" }
-smallvec = { version = "0.6.7", features = ["union", "may_dangle"] }
+smallvec = { version = "1.0", features = ["union", "may_dangle"] }
 syntax = { path = "../libsyntax" }
 syntax_expand = { path = "../libsyntax_expand" }
 syntax_pos = { path = "../libsyntax_pos" }