diff --git a/Cargo.lock b/Cargo.lock
index 5c84dae..4dbc2e5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "rls-vfs"
 version = "0.2.0"
 dependencies = [
  "racer 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rls-span 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rls-span 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -108,7 +108,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "rls-span"
-version = "0.1.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -254,7 +254,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum racer 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b0d72b3afd67882adfca61d609fafb8d7aa5f9e814f12c32fcc6e171995920e8"
 "checksum regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)" = "4fd4ace6a8cf7860714a2c2280d6c1f7e6a413486c13298bbc86fd3da019402f"
 "checksum regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "f9ec002c35e86791825ed294b50008eea9ddfc8def4420124fbc6b08db834957"
-"checksum rls-span 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8656f7b850ac85fb204ef94318c641bbb15a32766e12f9a589a23e4c0fbc38db"
+"checksum rls-span 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5d7c7046dc6a92f2ae02ed302746db4382e75131b9ce20ce967259f6b5867a6a"
 "checksum rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)" = "684ce48436d6465300c9ea783b6b14c4361d6b8dcbb1375b486a69cc19e2dfb0"
 "checksum strsim 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "67f84c44fbb2f91db7fef94554e6b2ac05909c9c0b0bc23bb98d3a1aebfe7f7c"
 "checksum syntex_errors 0.52.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9e52bffe6202cfb67587784cf23e0ec5bf26d331eef4922a16d5c42e12aa1e9b"
diff --git a/Cargo.toml b/Cargo.toml
index 2b8e449..207dae3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ repository = "https://github.com/nrc/rls-vfs"
 categories = ["development-tools"]
 
 [dependencies]
-rls-span = "0.1"
+rls-span = "0.4"
 racer = { version = "2.0", optional = true }
 
 [features]