diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50cee8fb..d713ba65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## [6.0.0]
+Released 16 April 2021
+### Breaking Changes
+- Increased the version of the num-complex dependency to 0.4.
+    - This is a breaking change because we have a public dependency on num-complex.
+    - See the [num-complex changelog](https://github.com/rust-num/num-complex/blob/master/RELEASES.md) for a list of breaking changes in num-complex 0.4
+    - As a high-level summary, most users will not need to do anything to upgrade to RustFFT 6.0: num-complex 0.4 re-exports a newer version of `rand`, and that's num-complex's only documented breaking change.
+
 ## [5.1.0]
 Released 16 April 2021
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index 789b77f0..7084cd98 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "rustfft"
-version = "5.1.0"
+version = "6.0.0"
 authors = ["Allen Welkie <allen.welkie at gmail>", "Elliott Mahler <join.together at gmail>"]
 edition = "2018"
 
@@ -26,7 +26,7 @@ sse = []
 
 
 [dependencies]
-num-complex = "0.3"
+num-complex = "0.4"
 num-traits = "0.2"
 num-integer = "^0.1.40"
 strength_reduce = "^0.2.1"
@@ -34,5 +34,5 @@ transpose = "0.2"
 primal-check = "0.3.1"
 
 [dev-dependencies]
-rand = "0.6"
+rand = "0.8"
 paste = "1.0.4"