diff --git a/internal/alpine/alpine.go b/internal/alpine/alpine.go
index d57c0bec..29b6410f 100644
--- a/internal/alpine/alpine.go
+++ b/internal/alpine/alpine.go
@@ -1,3 +1,4 @@
+// Package alpine defines a configurator to interact with the Alpine operating system.
 package alpine
 
 import (
diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index 26edc04b..c86ca9df 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -1,3 +1,4 @@
+// Package cli defines an interface CLI to run command line operations.
 package cli
 
 import (
diff --git a/internal/constants/constants.go b/internal/constants/constants.go
new file mode 100644
index 00000000..0828edfc
--- /dev/null
+++ b/internal/constants/constants.go
@@ -0,0 +1,3 @@
+// Package constants defines constants shared throughout the program.
+// It also defines constant maps and slices using functions.
+package constants
diff --git a/internal/dns/loop.go b/internal/dns/loop.go
index 90158990..15479207 100644
--- a/internal/dns/loop.go
+++ b/internal/dns/loop.go
@@ -1,3 +1,4 @@
+// Package dns defines interfaces to interact with DNS and DNS over TLS.
 package dns
 
 import (
diff --git a/internal/firewall/firewall.go b/internal/firewall/firewall.go
index 7e70e6cf..e569b84d 100644
--- a/internal/firewall/firewall.go
+++ b/internal/firewall/firewall.go
@@ -1,3 +1,5 @@
+// Package firewall defines a configurator used to change the state
+// of the firewall as well as do some light routing changes.
 package firewall
 
 import (
diff --git a/internal/healthcheck/health.go b/internal/healthcheck/health.go
index e2b68886..0e5e6373 100644
--- a/internal/healthcheck/health.go
+++ b/internal/healthcheck/health.go
@@ -1,3 +1,4 @@
+// Package healthcheck defines the client and server side of the built in healthcheck.
 package healthcheck
 
 import (
diff --git a/internal/httpproxy/loop.go b/internal/httpproxy/loop.go
index c4dee5cb..72d74275 100644
--- a/internal/httpproxy/loop.go
+++ b/internal/httpproxy/loop.go
@@ -1,3 +1,4 @@
+// Package httpproxy defines an interface to run an HTTP(s) proxy server.
 package httpproxy
 
 import (
diff --git a/internal/logging/splash.go b/internal/logging/splash.go
index d286c70b..1f4eadea 100644
--- a/internal/logging/splash.go
+++ b/internal/logging/splash.go
@@ -1,3 +1,4 @@
+// Package logging defines helper functions for logging.
 package logging
 
 import (
diff --git a/internal/models/models.go b/internal/models/models.go
new file mode 100644
index 00000000..b0123b9f
--- /dev/null
+++ b/internal/models/models.go
@@ -0,0 +1,3 @@
+// Package models defines struct with methods shared across other
+// packages in the program.
+package models
diff --git a/internal/openvpn/openvpn.go b/internal/openvpn/openvpn.go
index 6148bb6c..4fe52f10 100644
--- a/internal/openvpn/openvpn.go
+++ b/internal/openvpn/openvpn.go
@@ -1,3 +1,5 @@
+// Package openvpn defines interfaces to interact with openvpn
+// and run it in a stateful loop.
 package openvpn
 
 import (
diff --git a/internal/provider/provider.go b/internal/provider/provider.go
index f5b5f10f..0ae17fb2 100644
--- a/internal/provider/provider.go
+++ b/internal/provider/provider.go
@@ -1,3 +1,4 @@
+// Package provider defines interfaces to interact with each VPN provider.
 package provider
 
 import (
diff --git a/internal/publicip/publicip.go b/internal/publicip/publicip.go
index 9d3a9e6a..87e1994f 100644
--- a/internal/publicip/publicip.go
+++ b/internal/publicip/publicip.go
@@ -1,3 +1,4 @@
+// Package publicip defines interfaces to get your public IP address.
 package publicip
 
 import (
diff --git a/internal/routing/routing.go b/internal/routing/routing.go
index 4a2c34d0..97f54843 100644
--- a/internal/routing/routing.go
+++ b/internal/routing/routing.go
@@ -1,3 +1,4 @@
+// Package routing defines interfaces to interact with the ip routes using NETLINK.
 package routing
 
 import (
diff --git a/internal/server/server.go b/internal/server/server.go
index 564dbaa7..e2124aca 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -1,3 +1,4 @@
+// Package server defines an interface to run the HTTP control server.
 package server
 
 import (
diff --git a/internal/shadowsocks/loop.go b/internal/shadowsocks/loop.go
index e57ef57f..8db9b63e 100644
--- a/internal/shadowsocks/loop.go
+++ b/internal/shadowsocks/loop.go
@@ -1,3 +1,4 @@
+// Package shadowsocks defines interfaces to configure and run a Shadowsocks server.
 package shadowsocks
 
 import (
diff --git a/internal/storage/storage.go b/internal/storage/storage.go
index 894b0ac7..1a30fc92 100644
--- a/internal/storage/storage.go
+++ b/internal/storage/storage.go
@@ -1,3 +1,4 @@
+// Package storage defines interfaces to interact with the files persisted such as the list of servers.
 package storage
 
 import (
diff --git a/internal/unix/unix.go b/internal/unix/unix.go
index df6de678..95b6852b 100644
--- a/internal/unix/unix.go
+++ b/internal/unix/unix.go
@@ -1,3 +1,5 @@
+// Package unix defines interfaces to interact with Unix related objects.
+// Its primary use is to be used in tests.
 package unix
 
 import sysunix "golang.org/x/sys/unix"
diff --git a/internal/updater/updater.go b/internal/updater/updater.go
index fe8562f1..9226af2f 100644
--- a/internal/updater/updater.go
+++ b/internal/updater/updater.go
@@ -1,3 +1,4 @@
+// Package updater implements update mechanisms for each VPN provider servers.
 package updater
 
 import (
diff --git a/internal/version/version.go b/internal/version/version.go
index b654774e..8885c89e 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -1,3 +1,5 @@
+// Package version implements functions to fetch information from
+// Github on newer version of the program available.
 package version
 
 import (