diff --git a/flake.nix b/flake.nix
index 5741427955..fdaf84b1a7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -48,7 +48,7 @@
 
           sourmash = python.buildPythonPackage rec {
             pname = "sourmash";
-            version = "4.8.5";
+            version = "4.8.6-dev";
             format = "pyproject";
 
             src = ./.;
diff --git a/pyproject.toml b/pyproject.toml
index aef5f5911b..9f3ac7140b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = 'maturin'
 name = "sourmash"
 description = "tools for comparing biological sequences with k-mer sketches"
 readme = "README.md"
-version = "4.8.5"
+version = "4.8.6-dev"
 
 authors = [
   { name="Luiz Irber", orcid="0000-0003-4371-9659" },