diff --git a/Cargo.lock b/Cargo.lock
index 1054e49..5edd8b2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1481,9 +1481,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "preserves"
-version = "3.990.0"
+version = "4.991.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9dcce38db440a6d301aaf73f6692d1ca1a6cea5c2e5b2f5ac29fabbeb3dab15"
+checksum = "b4a244356924e0324af5205b20c03a203f4364640f816787bea3792b71eb4fd1"
 dependencies = [
  "base64",
  "dtoa",
@@ -1496,9 +1496,9 @@ dependencies = [
 
 [[package]]
 name = "preserves-schema"
-version = "3.990.0"
+version = "4.991.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830a3c2c01f2c2420ad5df48cf48fdb20bcfce797fb75e6294d3378d2a100e92"
+checksum = "12225b6104827dc6d513f7f418cbe1fa9399a54f699c34d03eec706fb8fb41c0"
 dependencies = [
  "convert_case",
  "glob",
diff --git a/syndicate-server/Cargo.toml b/syndicate-server/Cargo.toml
index ac1df93..5ca351e 100644
--- a/syndicate-server/Cargo.toml
+++ b/syndicate-server/Cargo.toml
@@ -13,11 +13,11 @@ license = "Apache-2.0"
 jemalloc = ["dep:tikv-jemallocator"]
 
 [build-dependencies]
-preserves-schema = "3.990"
+preserves-schema = "4.991"
 syndicate = { path = "../syndicate", version = "0.29.0"}
 
 [dependencies]
-preserves-schema = "3.990"
+preserves-schema = "4.991"
 syndicate = { path = "../syndicate", version = "0.29.0"}
 syndicate-macros = { path = "../syndicate-macros", version = "0.24.0"}
 
diff --git a/syndicate-server/protocols/schemas/documentation.prs b/syndicate-server/protocols/schemas/documentation.prs
index 2369728..3b99f11 100644
--- a/syndicate-server/protocols/schemas/documentation.prs
+++ b/syndicate-server/protocols/schemas/documentation.prs
@@ -1,11 +1,11 @@
 version 1 .
 
-; Assertion. Describes `object`.
+# Assertion. Describes `object`.
 Metadata = <metadata @object any @info { symbol: any ...:... }> .
 
-; Projections of the `info` in a `Metadata` record.
+# Projections of the `info` in a `Metadata` record.
 Description = @present { description: IOList } / @invalid { description: any } / @absent {} .
 Url = @present { url: string } / @invalid { url: any } / @absent {} .
 
-; Data type. From preserves' `conventions.md`.
+# Data type. From preserves' `conventions.md`.
 IOList = @bytes bytes / @string string / @nested [IOList ...] .
diff --git a/syndicate-server/protocols/schemas/externalServices.prs b/syndicate-server/protocols/schemas/externalServices.prs
index dcfde99..c86db14 100644
--- a/syndicate-server/protocols/schemas/externalServices.prs
+++ b/syndicate-server/protocols/schemas/externalServices.prs
@@ -30,26 +30,26 @@ EnvVariable = @string string / @symbol symbol / @invalid any .
 EnvValue = @set string / @remove #f / @invalid any .
 
 RestartPolicy =
-/ ; Whether the process terminates normally or abnormally, restart it
-  ; without affecting any peer processes within the service.
+/ # Whether the process terminates normally or abnormally, restart it
+  # without affecting any peer processes within the service.
   =always
-/ ; If the process terminates normally, leave everything alone; if it
-  ; terminates abnormally, restart it without affecting peers.
+/ # If the process terminates normally, leave everything alone; if it
+  # terminates abnormally, restart it without affecting peers.
   @onError =on-error
-/ ; If the process terminates normally, leave everything alone; if it
-  ; terminates abnormally, restart the whole daemon (all processes
-  ; within the daemon).
+/ # If the process terminates normally, leave everything alone; if it
+  # terminates abnormally, restart the whole daemon (all processes
+  # within the daemon).
   =all
-/ ; Treat both normal and abnormal termination as normal termination; that is, never restart,
-  ; and enter state "complete" even if the process fails.
+/ # Treat both normal and abnormal termination as normal termination; that is, never restart,
+  # and enter state "complete" even if the process fails.
   =never
 .
 
 Protocol =
-/ ; stdin is /dev/null, output and error are logged
+/ # stdin is /dev/null, output and error are logged
   =none
-/ ; stdin and stdout are *binary* Syndicate-protocol channels
+/ # stdin and stdout are *binary* Syndicate-protocol channels
   @binarySyndicate =application/syndicate
-/ ; stdin and stdout are *text* Syndicate-protocol channels
+/ # stdin and stdout are *text* Syndicate-protocol channels
   @textSyndicate =text/syndicate
 .
diff --git a/syndicate-tools/Cargo.toml b/syndicate-tools/Cargo.toml
index b37e4ca..fddc7ce 100644
--- a/syndicate-tools/Cargo.toml
+++ b/syndicate-tools/Cargo.toml
@@ -10,7 +10,7 @@ repository = "https://git.syndicate-lang.org/syndicate-lang/syndicate-rs"
 license = "Apache-2.0"
 
 [dependencies]
-preserves = "3.990"
+preserves = "4.991"
 syndicate = { path = "../syndicate", version = "0.29.0"}
 
 clap = { version = "^4.0", features = ["derive"] }
diff --git a/syndicate/Cargo.toml b/syndicate/Cargo.toml
index 8a6f053..d8d0f9c 100644
--- a/syndicate/Cargo.toml
+++ b/syndicate/Cargo.toml
@@ -13,11 +13,11 @@ license = "Apache-2.0"
 vendored-openssl = ["openssl/vendored"]
 
 [build-dependencies]
-preserves-schema = "3.990"
+preserves-schema = "4.991"
 
 [dependencies]
-preserves = "3.990"
-preserves-schema = "3.990"
+preserves = "4.991"
+preserves-schema = "4.991"
 
 tokio = { version = "1.10", features = ["io-util", "macros", "rt", "rt-multi-thread", "time"] }
 tokio-util = "0.6"