diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index b2fb07f08c..459f29ece2 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -273,11 +273,11 @@ jobs:
 
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.65.0"
+          toolchain: "1.66.0"
           override: true
 
       - name: check if README matches MSRV defined here
-        run: grep '1.65.0' src/core/README.md
+        run: grep '1.66.0' src/core/README.md
 
       - name: Check if it builds properly
         uses: actions-rs/cargo@v1
diff --git a/Cargo.lock b/Cargo.lock
index 931de74a05..06ab8e9bfe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -90,17 +90,16 @@ dependencies = [
 
 [[package]]
 name = "bindgen"
-version = "0.65.1"
+version = "0.69.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfdf7b466f9a4903edc73f95d6d2bcd5baf8ae620638762244d3f60143643cc5"
+checksum = "271383c67ccabffb7381723dea0672a673f292304fcb45c01cc648c7a8d58088"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags 2.4.1",
  "cexpr",
  "clang-sys",
+ "itertools 0.12.1",
  "lazy_static",
  "lazycell",
- "peeking_take_while",
- "prettyplease",
  "proc-macro2",
  "quote",
  "regex",
@@ -844,9 +843,9 @@ checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
 
 [[package]]
 name = "librocksdb-sys"
-version = "0.11.0+8.1.1"
+version = "0.16.0+8.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3386f101bcb4bd252d8e9d2fb41ec3b0862a15a62b478c355b2982efa469e3e"
+checksum = "ce3d60bc059831dc1c83903fb45c103f75db65c5a7bf22272764d9cc683e348c"
 dependencies = [
  "bindgen",
  "bzip2-sys",
@@ -1163,12 +1162,6 @@ version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
 
-[[package]]
-name = "peeking_take_while"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
-
 [[package]]
 name = "piz"
 version = "0.5.1"
@@ -1225,16 +1218,6 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
 
-[[package]]
-name = "prettyplease"
-version = "0.2.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c64d9ba0963cdcea2e1b2230fbae2bab30eb25a174be395c41e764bfb65dd62"
-dependencies = [
- "proc-macro2",
- "syn 2.0.87",
-]
-
 [[package]]
 name = "primal-check"
 version = "0.3.4"
@@ -1485,9 +1468,9 @@ dependencies = [
 
 [[package]]
 name = "rocksdb"
-version = "0.21.0"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb6f170a4041d50a0ce04b0d2e14916d6ca863ea2e422689a5b694395d299ffe"
+checksum = "6bd13e55d6d7b8cd0ea569161127567cd587676c99f4472f779a0279aa60a7a7"
 dependencies = [
  "libc",
  "librocksdb-sys",
diff --git a/src/core/Cargo.toml b/src/core/Cargo.toml
index 7167f3916e..bb309900c7 100644
--- a/src/core/Cargo.toml
+++ b/src/core/Cargo.toml
@@ -11,7 +11,7 @@ edition = "2021"
 readme = "README.md"
 autoexamples = false
 autobins = false
-rust-version = "1.65.0"
+rust-version = "1.66.0"
 
 [lib]
 name = "sourmash"
@@ -109,6 +109,6 @@ wasm-bindgen-test = "0.3.42"
 
 ### These crates don't compile on wasm
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-rocksdb = { version = "0.21.0", optional = true }
+rocksdb = { version = "0.22.0", optional = true }
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 criterion = "0.5.1"
diff --git a/src/core/README.md b/src/core/README.md
index b71baaabc1..0fa56ad29b 100644
--- a/src/core/README.md
+++ b/src/core/README.md
@@ -38,4 +38,4 @@ Development happens on github at
 
 ## Minimum supported Rust version
 
-Currently the minimum supported Rust version is 1.65.0.
+Currently the minimum supported Rust version is 1.66.0.