diff --git a/sbp/Cargo.toml b/sbp/Cargo.toml
index 165f71f..0083e10 100644
--- a/sbp/Cargo.toml
+++ b/sbp/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Magnus Ulimoen <flymagnus@gmail.com>"]
 edition = "2018"
 
 [dependencies]
-ndarray = { version = "0.13.0", features = ["approx"] }
+ndarray = { version = "0.13.1", features = ["approx"] }
 approx = "0.3.2"
 packed_simd = "0.3.3"
 rayon = { version = "1.3.0", optional = true }
diff --git a/sbp/src/euler.rs b/sbp/src/euler.rs
index 57c3a23..113d99b 100644
--- a/sbp/src/euler.rs
+++ b/sbp/src/euler.rs
@@ -261,15 +261,8 @@ impl Field {
         ArrayViewMut2<Float>,
         ArrayViewMut2<Float>,
     ) {
-        let mut iter = self.0.outer_iter_mut();
-
-        let rho = iter.next().unwrap();
-        let rhou = iter.next().unwrap();
-        let rhov = iter.next().unwrap();
-        let e = iter.next().unwrap();
-        assert_eq!(iter.next(), None);
-
-        (rho, rhou, rhov, e)
+        self.0
+            .multi_slice_mut((s![0, .., ..], s![1, .., ..], s![2, .., ..], s![3, .., ..]))
     }
 
     pub fn north(&self) -> ArrayView2<Float> {
diff --git a/sbp/src/maxwell.rs b/sbp/src/maxwell.rs
index 67cdf6a..dcc2676 100644
--- a/sbp/src/maxwell.rs
+++ b/sbp/src/maxwell.rs
@@ -73,14 +73,8 @@ impl Field {
         ArrayViewMut2<Float>,
         ArrayViewMut2<Float>,
     ) {
-        let mut iter = self.0.outer_iter_mut();
-
-        let ex = iter.next().unwrap();
-        let hz = iter.next().unwrap();
-        let ey = iter.next().unwrap();
-        assert_eq!(iter.next(), None);
-
-        (ex, hz, ey)
+        self.0
+            .multi_slice_mut((s![0, .., ..], s![1, .., ..], s![2, .., ..]))
     }
 }