diff --git a/.gitignore b/.gitignore
index 5a5d521..105354c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@
 /orjson-3.9.12.tar.gz
 /orjson-3.9.13.tar.gz
 /orjson-3.10.1.tar.gz
+/orjson-3.10.3.tar.gz
diff --git a/python-orjson.spec b/python-orjson.spec
index 560ebed..8fdd6c3 100644
--- a/python-orjson.spec
+++ b/python-orjson.spec
@@ -8,8 +8,8 @@
 %bcond tests 1
 
 Name:           python-orjson
-Version:        3.10.1
-Release:        2%{?dist}
+Version:        3.10.3
+Release:        1%{?dist}
 Summary:        Fast, correct Python JSON library
 
 License:        Apache-2.0 OR MIT
@@ -52,8 +52,10 @@ License:        %{shrink:
 %autosetup -p1 -n orjson-%{version}
 %cargo_prep
 
-# Remove unstable feature that requires rust nightly
+# Remove unstable features that require rust nightly; the avx512 feature also
+# requires the x86_64 architecture
 tomcli-set Cargo.toml del 'features.unstable-simd'
+tomcli-set Cargo.toml del 'features.avx512'
 # Remove no-panic feature
 tomcli-set Cargo.toml del 'features.no-panic'
 # Remove strict dependencies
@@ -99,6 +101,9 @@ export RUSTFLAGS='%{build_rustflags}'
 
 
 %changelog
+* Sat Jun 01 2024 Benjamin A. Beasley <code@musicinmybrain.net> - 3.10.3-1
+- Update to 3.10.3. Fixes rhbz#2278078.
+
 * Fri May 24 2024 Benjamin A. Beasley <code@musicinmybrain.net> - 3.10.1-2
 - Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces
 
diff --git a/sources b/sources
index fffc269..d30640f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (orjson-3.10.1.tar.gz) = 54b927f407a584b0751403b3473bdb26fa3827e07895a28255b7ef938dc404d36fd388e47ddd0e724916786a3e52ef9fe5f245d8d2732d1cb6880bedb75135cf
+SHA512 (orjson-3.10.3.tar.gz) = 7c29ca375e18170088bfbd0adf58be0291668c77bdae30f74568731350ac384f70430fe3e52ff29733959685cd02bac33ddaae035b9f35824c8daf3c80419506