diff --git a/Cargo.lock b/Cargo.lock
index 94da456c..5503c0ed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1270,6 +1270,26 @@ version = "2.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
 
+[[package]]
+name = "protobuf"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58678a64de2fced2bdec6bca052a6716a0efe692d6e3f53d1bda6a1def64cfc0"
+dependencies = [
+ "once_cell",
+ "protobuf-support",
+ "thiserror",
+]
+
+[[package]]
+name = "protobuf-support"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1ed294a835b0f30810e13616b1cd34943c6d1e84a8f3b0dcfe466d256c3e7e7"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.26"
@@ -1405,7 +1425,7 @@ checksum = "1005d55a9a8cb53f6ab2380792031394fff549b020cde16cecbc0978df9e7242"
 dependencies = [
  "docopt",
  "libc",
- "protobuf",
+ "protobuf 2.28.0",
  "rustls",
  "rustls-pemfile",
  "serde",
@@ -1501,7 +1521,7 @@ dependencies = [
  "loggerv",
  "ordered-float",
  "procfs",
- "protobuf",
+ "protobuf 3.4.0",
  "rand",
  "raw-cpuid",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index 2074d408..e6ca698c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ clap = { version = "4.2", features = ["cargo", "derive"] }
 regex = "1.7"
 riemann_client = { version = "0.9.0", optional = true }
 hostname = "0.3.1"
-protobuf = "2.28.0"
+protobuf = "3.4.0"
 serde = { version = "1.0", features = ["derive"], optional = true }
 serde_json = { version = "1.0", optional = true }
 ordered-float = "2.0"