diff --git a/Cargo.lock b/Cargo.lock
index 8280af56..7e5537ca 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1315,7 +1315,7 @@ dependencies = [
 
 [[package]]
 name = "mwa_hyperdrive"
-version = "0.2.0-alpha.10"
+version = "0.2.0-alpha.11"
 dependencies = [
  "approx",
  "assert_cmd",
diff --git a/Cargo.toml b/Cargo.toml
index 30446b57..07cabf9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mwa_hyperdrive"
-version = "0.2.0-alpha.10"
+version = "0.2.0-alpha.11"
 authors = [
     "Christopher H. Jordan <christopherjordan87@gmail.com>",
     "Derwent McElhinney <derwent.mcelhinney@curtin.edu.au>"
diff --git a/src/constants.rs b/src/constants.rs
index 0575bf78..3350595c 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -21,7 +21,7 @@ pub(crate) const DEFAULT_STOP_THRESHOLD: f64 = 1e-8;
 pub(crate) const DEFAULT_MIN_THRESHOLD: f64 = 1e-4;
 
 /// The default calibration solutions filename to use.
-pub(crate) const DEFAULT_OUTPUT_SOLUTIONS_FILENAME: &str = "hyperdrive_solutions.bin";
+pub(crate) const DEFAULT_OUTPUT_SOLUTIONS_FILENAME: &str = "hyperdrive_solutions.fits";
 
 // sqrt(pi^2 / (2 ln(2)))
 pub(crate) const SQRT_FRAC_PI_SQ_2_LN_2: f64 = 2.6682231283184983;