diff --git a/Cargo.lock b/Cargo.lock
index ff33e7cf..1d50ff1a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -311,7 +311,8 @@ dependencies = [
  "either",
  "inkwell_internals",
  "libc",
- "llvm-sys",
+ "llvm-sys 100.2.1",
+ "llvm-sys 110.0.1",
  "once_cell",
  "parking_lot",
  "regex",
@@ -421,7 +422,20 @@ dependencies = [
  "lazy_static",
  "libc",
  "regex",
- "semver",
+ "semver 0.9.0",
+]
+
+[[package]]
+name = "llvm-sys"
+version = "110.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21ede189444b8c78907e5d36da5dabcf153170fcff9c1dba48afc4b33c7e19f0"
+dependencies = [
+ "cc",
+ "lazy_static",
+ "libc",
+ "regex",
+ "semver 0.11.0",
 ]
 
 [[package]]
@@ -599,6 +613,15 @@ dependencies = [
  "proc-macro-hack",
 ]
 
+[[package]]
+name = "pest"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10f4872ae94d7b90ae48754df22fd42ad52ce740b8f370b03da4835417403e53"
+dependencies = [
+ "ucd-trie",
+]
+
 [[package]]
 name = "petgraph"
 version = "0.5.1"
@@ -889,7 +912,16 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 dependencies = [
- "semver-parser",
+ "semver-parser 0.7.0",
+]
+
+[[package]]
+name = "semver"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f301af10236f6df4160f7c3f04eec6dbc70ace82d23326abad5edee88801c6b6"
+dependencies = [
+ "semver-parser 0.10.2",
 ]
 
 [[package]]
@@ -898,6 +930,15 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "semver-parser"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00b0bef5b7f9e0df16536d3961cfb6e84331c065b4066afb39768d0e319411f7"
+dependencies = [
+ "pest",
+]
+
 [[package]]
 name = "siphasher"
 version = "0.3.5"
@@ -966,6 +1007,12 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "ucd-trie"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
+
 [[package]]
 name = "unic-char-property"
 version = "0.9.0"
diff --git a/nac3core/Cargo.toml b/nac3core/Cargo.toml
index c0581cc1..bbd553e4 100644
--- a/nac3core/Cargo.toml
+++ b/nac3core/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 num-bigint = "0.3"
 num-traits = "0.2"
-inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "master", features = ["llvm10-0"] }
+inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "master", features = ["llvm11-0"] }
 rustpython-parser = { git = "https://github.com/RustPython/RustPython", branch = "master" }
 itertools = "0.10.1"
 crossbeam = "0.8.1"
@@ -17,4 +17,3 @@ rayon = "1.5.1"
 [dev-dependencies]
 test-case = "1.2.0"
 indoc = "1.0"
-
diff --git a/shell.nix b/shell.nix
index 858e68b9..35be2055 100644
--- a/shell.nix
+++ b/shell.nix
@@ -4,6 +4,6 @@ in
   pkgs.stdenv.mkDerivation {
     name = "nac3-env";
     buildInputs = with pkgs; [
-      llvm_10 clang_10 cargo rustc libffi libxml2 clippy
+      llvm_11 clang_11 cargo rustc libffi libxml2 clippy
     ];
   }