diff --git a/sim/simflash/Cargo.toml b/sim/simflash/Cargo.toml
index 13c3376..d65dc8a 100644
--- a/sim/simflash/Cargo.toml
+++ b/sim/simflash/Cargo.toml
@@ -2,6 +2,7 @@
 name = "simflash"
 version = "0.1.0"
 authors = ["David Brown <david.brown@linaro.org>"]
+edition = "2018"
 
 [dependencies]
 error-chain = "0.12.0"
diff --git a/sim/simflash/src/lib.rs b/sim/simflash/src/lib.rs
index df1020e..26f8187 100644
--- a/sim/simflash/src/lib.rs
+++ b/sim/simflash/src/lib.rs
@@ -15,7 +15,7 @@
 use std::path::Path;
 use std::slice;
 use std::collections::HashMap;
-use pdump::HexDump;
+use crate::pdump::HexDump;
 
 error_chain! {
     errors {