diff --git a/source/_posts/caddy-nixos-part-3.md b/source/_posts/caddy-nixos-part-3.md
index 08d6680..b8604ca 100644
--- a/source/_posts/caddy-nixos-part-3.md
+++ b/source/_posts/caddy-nixos-part-3.md
@@ -101,7 +101,7 @@ in {
       environment = mkIf (versionAtLeast config.system.stateVersion "17.09")
         { CADDYPATH = cfg.dataDir; };
       startLimitIntervalSec = 86400;
-      # 20.09+
+      # https://github.com/NixOS/nixpkgs/pull/97512
       # startLimitBurst = 5;
       serviceConfig = {
         ExecStart = ''
diff --git a/source/_posts/caddy-v2-nixos.md b/source/_posts/caddy-v2-nixos.md
index 7b4ca5c..bff0718 100644
--- a/source/_posts/caddy-v2-nixos.md
+++ b/source/_posts/caddy-v2-nixos.md
@@ -80,7 +80,7 @@ in {
       environment = mkIf (versionAtLeast config.system.stateVersion "17.09" && !isCaddy2)
         { CADDYPATH = cfg.dataDir; };
       startLimitIntervalSec = 86400;
-      # 20.09+
+      # https://github.com/NixOS/nixpkgs/pull/97512
       # startLimitBurst = 5;
       serviceConfig = {
         ExecStart = ''
diff --git a/source/_posts/i2p-eepsite-nixos.md b/source/_posts/i2p-eepsite-nixos.md
index 9e35b59..bf7600c 100644
--- a/source/_posts/i2p-eepsite-nixos.md
+++ b/source/_posts/i2p-eepsite-nixos.md
@@ -149,7 +149,7 @@ in {
       environment = mkIf (versionAtLeast config.system.stateVersion "17.09")
         { CADDYPATH = cfg.dataDir; };
       startLimitIntervalSec = 86400;
-      # 20.09+
+      # https://github.com/NixOS/nixpkgs/pull/97512
       # startLimitBurst = 5;
       serviceConfig = {
         ExecStart = ''
diff --git a/source/_posts/tor-hidden-onion-nixos.md b/source/_posts/tor-hidden-onion-nixos.md
index 62025db..d52df85 100644
--- a/source/_posts/tor-hidden-onion-nixos.md
+++ b/source/_posts/tor-hidden-onion-nixos.md
@@ -124,7 +124,7 @@ in {
       environment = mkIf (versionAtLeast config.system.stateVersion "17.09")
         { CADDYPATH = cfg.dataDir; };
       startLimitIntervalSec = 86400;
-      # 20.09+
+      # https://github.com/NixOS/nixpkgs/pull/97512
       # startLimitBurst = 5;
       serviceConfig = {
         ExecStart = ''