diff --git a/Cargo.lock b/Cargo.lock
index e8ae4c42c6..2bac054279 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -410,7 +410,6 @@ dependencies = [
  "rand",
  "regex",
  "serde",
- "serde_derive",
  "tar",
  "tokio-postgres",
  "toml",
@@ -1860,6 +1859,9 @@ name = "serde"
 version = "1.0.125"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "558dc50e1a5a5fa7112ca2ce4effcb321b0300c0d4ccf0776a9f60cd89031171"
+dependencies = [
+ "serde_derive",
+]
 
 [[package]]
 name = "serde-xml-rs"
diff --git a/control_plane/Cargo.toml b/control_plane/Cargo.toml
index 0d49488bd7..f408763b01 100644
--- a/control_plane/Cargo.toml
+++ b/control_plane/Cargo.toml
@@ -12,10 +12,9 @@ tar = "0.4.33"
 postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="a0d067b66447951d1276a53fb09886539c3fa094" }
 tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="a0d067b66447951d1276a53fb09886539c3fa094" }
 
-serde = ""
-serde_derive = ""
-toml = ""
-lazy_static = ""
+serde = { version = "1.0", features = ["derive"] }
+toml = "0.5"
+lazy_static = "1.4"
 regex = "1"
 anyhow = "1.0"
 hex = "0.4.3"
diff --git a/control_plane/src/local_env.rs b/control_plane/src/local_env.rs
index 019b063370..d983c3be95 100644
--- a/control_plane/src/local_env.rs
+++ b/control_plane/src/local_env.rs
@@ -13,7 +13,7 @@ use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 
 use anyhow::Result;
-use serde_derive::{Deserialize, Serialize};
+use serde::{Deserialize, Serialize};
 
 use pageserver::zenith_repo_dir;
 use pageserver::ZTimelineId;
diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml
index 5309a77591..3b1e4bd503 100644
--- a/pageserver/Cargo.toml
+++ b/pageserver/Cargo.toml
@@ -38,7 +38,7 @@ walkdir = "2"
 thiserror = "1.0"
 hex = "0.4.3"
 tar = "0.4.33"
-parse_duration = "*"
+parse_duration = "2.1.1"
 
 postgres_ffi = { path = "../postgres_ffi" }
 zenith_utils = { path = "../zenith_utils" }
diff --git a/walkeeper/Cargo.toml b/walkeeper/Cargo.toml
index fdd5b8b223..e4ae947570 100644
--- a/walkeeper/Cargo.toml
+++ b/walkeeper/Cargo.toml
@@ -28,7 +28,7 @@ postgres-protocol = { git = "https://github.com/zenithdb/rust-postgres.git", rev
 postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="a0d067b66447951d1276a53fb09886539c3fa094" }
 anyhow = "1.0"
 crc32c = "0.6.0"
-parse_duration = "*"
+parse_duration = "2.1.1"
 walkdir = "2"
 
 # FIXME: 'pageserver' is needed for ZTimelineId. Refactor