diff --git a/multigrid/Cargo.toml b/multigrid/Cargo.toml
index 2c014c4..c072120 100644
--- a/multigrid/Cargo.toml
+++ b/multigrid/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 
 [dependencies]
-sbp = { path = "../sbp", features = ["rayon", "serde1"] }
+sbp = { path = "../sbp", features = ["rayon", "serde1", "fast-float"] }
 euler = { path = "../euler", features = ["serde1"] }
 hdf5 = "0.7.0"
 rayon = "1.3.0"
@@ -14,5 +14,5 @@ indicatif = "0.15.0"
 structopt = "0.3.14"
 ndarray = { version = "0.13.1", features = ["serde"] }
 serde = { version = "1.0.115", features = ["derive"] }
-json5 = "0.2.8"
+json5 = "0.3.0"
 indexmap = { version = "1.5.2", features = ["serde-1"] }
diff --git a/multigrid/src/main.rs b/multigrid/src/main.rs
index e885bfb..cff42d9 100644
--- a/multigrid/src/main.rs
+++ b/multigrid/src/main.rs
@@ -197,7 +197,20 @@ fn main() {
     let opt = Options::from_args();
     let filecontents = std::fs::read_to_string(&opt.json).unwrap();
 
-    let config: parsing::Configuration = json5::from_str(&filecontents).unwrap();
+    let config: parsing::Configuration = match json5::from_str(&filecontents) {
+        Ok(config) => config,
+        Err(e) => {
+            eprintln!("Configuration could not be read: {}", e);
+            if let json5::Error::Message {
+                location: Some(location),
+                ..
+            } = e
+            {
+                eprintln!("\t{:?}", location);
+            }
+            return;
+        }
+    };
 
     let parsing::RuntimeConfiguration {
         names,