diff --git a/var/spack/repos/builtin/packages/mgard/package.py b/var/spack/repos/builtin/packages/mgard/package.py
index 135e4c604ae..173247e43ab 100644
--- a/var/spack/repos/builtin/packages/mgard/package.py
+++ b/var/spack/repos/builtin/packages/mgard/package.py
@@ -53,6 +53,8 @@ class Mgard(CMakePackage, CudaPackage):
     depends_on("pkgconfig", type=("build",), when="@2022-11-18:")
     depends_on("zstd")
     depends_on("protobuf@3.4:", when="@2022-11-18:")
+    # See https://github.com/CODARcode/MGARD/issues/240
+    depends_on("protobuf@:3.28", when="@:2023-12-09")
     depends_on("libarchive", when="@2021-11-12:")
     depends_on("tclap", when="@2021-11-12")
     depends_on("yaml-cpp", when="@2021-11-12:")
diff --git a/var/spack/repos/builtin/packages/protobuf/package.py b/var/spack/repos/builtin/packages/protobuf/package.py
index a41f0e411e5..2187d62debf 100644
--- a/var/spack/repos/builtin/packages/protobuf/package.py
+++ b/var/spack/repos/builtin/packages/protobuf/package.py
@@ -15,6 +15,7 @@ class Protobuf(CMakePackage):
 
     license("BSD-3-Clause")
 
+    version("3.29.3", sha256="c8d0ed0085f559444f70311791cf7aef414246b9942441443963184b534dbf9e")
     version("3.28.2", sha256="1b6b6a7a7894f509f099c4469b5d4df525c2f3c9e4009e5b2db5b0f66cb8ee0e")
     version("3.27.5", sha256="a4aa92d0a207298149bf553d9a3192f3562eb91740086f50fa52331e60fa480c")
     version("3.26.1", sha256="f3c0830339eaa5036eba8ff8ce7fca5aa3088f7d616f7c3713d946f611ae92bf")