diff --git a/README.md b/README.md
index 781d9278..5839995b 100644
--- a/README.md
+++ b/README.md
@@ -167,7 +167,7 @@ $ chisel server --help
     and you cannot set --tls-domain.
 
     --tls-domain, Enables TLS and automatically acquires a TLS key and
-    certificate using LetsEncypt. Setting --tls-domain requires port 443.
+    certificate using LetsEncrypt. Setting --tls-domain requires port 443.
     You may specify multiple --tls-domain flags to serve multiple domains.
     The resulting files are cached in the "$HOME/.cache/chisel" directory.
     You can modify this path by setting the CHISEL_LE_CACHE variable,
diff --git a/main.go b/main.go
index bba3e747..7c175423 100644
--- a/main.go
+++ b/main.go
@@ -151,7 +151,7 @@ var serverHelp = `
     and you cannot set --tls-domain.
 
     --tls-domain, Enables TLS and automatically acquires a TLS key and
-    certificate using LetsEncypt. Setting --tls-domain requires port 443.
+    certificate using LetsEncrypt. Setting --tls-domain requires port 443.
     You may specify multiple --tls-domain flags to serve multiple domains.
     The resulting files are cached in the "$HOME/.cache/chisel" directory.
     You can modify this path by setting the CHISEL_LE_CACHE variable,