diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 51041d65..c9fac079 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -29,7 +29,6 @@ jobs:
         auto-update-conda: true
         python-version: 3.12
         channels: conda-forge,bioconda
-        miniforge-variant: Mambaforge
         miniforge-version: latest
         use-mamba: true
         mamba-version: "*"
diff --git a/Cargo.lock b/Cargo.lock
index 37308eaf..87c0d5e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -713,9 +713,9 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.70"
+version = "0.3.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1868808506b929d7b0cfa8f75951347aa71bb21144b7791bae35d9bccfcfe37a"
+checksum = "6a88f1bda2bd75b0452a14784937d796722fdebfe50df998aeb3f0b7603019a9"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -1549,7 +1549,8 @@ checksum = "bceb57dc07c92cdae60f5b27b3fa92ecaaa42fe36c55e22dbfb0b44893e0b1f7"
 [[package]]
 name = "sourmash"
 version = "0.16.0"
-source = "git+https://github.com/sourmash-bio/sourmash.git?branch=refactor_rs_downsample#ceaea393d95b3b85575b51c20784d3b9442da149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "596f20eac8896a06ca65889399ea6f408deeba375aa44c4a2efb3b46e31a02c0"
 dependencies = [
  "az",
  "byteorder",
@@ -1802,9 +1803,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.93"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a82edfc16a6c469f5f44dc7b571814045d60404b55a0ee849f9bcfa2e63dd9b5"
+checksum = "128d1e363af62632b8eb57219c8fd7877144af57558fb2ef0368d0087bddeb2e"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -1813,9 +1814,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.93"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9de396da306523044d3302746f1208fa71d7532227f15e347e2d93e4145dd77b"
+checksum = "cb6dd4d3ca0ddffd1dd1c9c04f94b868c37ff5fac97c30b97cff2d74fce3a358"
 dependencies = [
  "bumpalo",
  "log",
@@ -1828,9 +1829,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.93"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "585c4c91a46b072c92e908d99cb1dcdf95c5218eeb6f3bf1efa991ee7a68cccf"
+checksum = "e79384be7f8f5a9dd5d7167216f022090cf1f9ec128e6e6a482a2cb5c5422c56"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -1838,9 +1839,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.93"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afc340c74d9005395cf9dd098506f7f44e38f2b4a21c6aaacf9a105ea5e1e836"
+checksum = "26c6ab57572f7a24a4985830b120de1594465e5d500f24afe89e16b4e833ef68"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1851,15 +1852,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.93"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c62a0a307cb4a311d3a07867860911ca130c3494e8c2719593806c08bc5d0484"
+checksum = "65fc09f10666a9f147042251e0dda9c18f166ff7de300607007e96bdebc1068d"
 
 [[package]]
 name = "web-sys"
-version = "0.3.70"
+version = "0.3.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26fdeaafd9bd129f65e7c031593c24d62186301e0c72c8978fa1678be7d532c0"
+checksum = "f6488b90108c040df0fe62fa815cbdee25124641df01814dd7282749234c6112"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/Cargo.toml b/Cargo.toml
index 48fc6688..80103eef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,8 +12,7 @@ crate-type = ["cdylib"]
 pyo3 = { version = "0.22.4", features = ["extension-module", "anyhow"] }
 rayon = "1.10.0"
 serde = { version = "1.0.210", features = ["derive"] }
-#sourmash = { version = "0.15.2", features = ["branchwater"] }
-sourmash = { git = "https://github.com/sourmash-bio/sourmash.git", branch = "refactor_rs_downsample", features = ["branchwater"] }
+sourmash = { version = "0.16.0", features = ["branchwater"] }
 serde_json = "1.0.128"
 niffler = "2.4.0"
 log = "0.4.22"