diff --git a/conf.d/.default.conf b/conf.d/.default.conf
index 910ba69..2059bbd 100644
--- a/conf.d/.default.conf
+++ b/conf.d/.default.conf
@@ -2,7 +2,7 @@
 # | Default behavior for unknown hosts                                 |
 # ----------------------------------------------------------------------
 #
-# Drop requests for unknown hosts
+# Drop requests for unknown hosts.
 #
 # If no default server is defined, Nginx will use the first found server.
 # To prevent host header attacks, or other potential problems when an unknown
diff --git a/conf.d/no-ssl.default.conf b/conf.d/no-ssl.default.conf
index 9a4ba8b..f3e2be3 100644
--- a/conf.d/no-ssl.default.conf
+++ b/conf.d/no-ssl.default.conf
@@ -2,7 +2,7 @@
 # | Default behavior for unknown hosts                                 |
 # ----------------------------------------------------------------------
 #
-# Drop requests for unknown hosts
+# Drop requests for unknown hosts.
 #
 # If no default server is defined, Nginx will use the first found server.
 # To prevent host header attacks, or other potential problems when an unknown
diff --git a/h5bp/security/content-security-policy.conf b/h5bp/security/content-security-policy.conf
index 6284d23..f77fb4c 100644
--- a/h5bp/security/content-security-policy.conf
+++ b/h5bp/security/content-security-policy.conf
@@ -5,7 +5,7 @@
 # Mitigate the risk of cross-site scripting and other content-injection
 # attacks.
 #
-# This can be done by setting a `Content Security Policy` which whitelists
+# This can be done by setting a Content Security Policy which permits
 # trusted sources of content for your website.
 #
 # There is no policy that fits all websites, you will have to modify the
diff --git a/h5bp/security/x-xss-protection.conf b/h5bp/security/x-xss-protection.conf
index d3ae23e..df81f49 100644
--- a/h5bp/security/x-xss-protection.conf
+++ b/h5bp/security/x-xss-protection.conf
@@ -8,9 +8,9 @@
 #     web browsers.
 #
 #     The filter is usually enabled by default, but in some cases, it may be
-#     disabled by the user. However, in Internet Explorer, for example, it can be
-#     re-enabled just by sending the  `X-XSS-Protection` header with the value
-#     of `1`.
+#     disabled by the user. However, in Internet Explorer, for example, it can
+#     be re-enabled just by sending the `X-XSS-Protection` header with the
+#     value of `1`.
 #
 # (2) Prevent web browsers from rendering the web page if a potential reflected
 #     (a.k.a non-persistent) XSS attack is detected by the filter.
diff --git a/h5bp/ssl/certificate_files.conf b/h5bp/ssl/certificate_files.conf
index 27a1042..332f885 100644
--- a/h5bp/ssl/certificate_files.conf
+++ b/h5bp/ssl/certificate_files.conf
@@ -8,7 +8,7 @@
 # users of IE 8 and below on WinXP can see your main site without SSL errors.
 #
 # (1) Certificate and key files location
-#     The certificate file can contain intermediate certificate.
+#     The certificate file can contain an intermediate certificate.
 #
 #     https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_certificate
 #
@@ -17,7 +17,7 @@
 #
 #     https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_trusted_certificate
 #
-# (3) CA certificate file location for client certificate authentication
+# (3) CA certificate file location for client certificate authentication.
 #
 #     https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_client_certificate
 
diff --git a/h5bp/web_performance/pre-compressed_content_brotli.conf b/h5bp/web_performance/pre-compressed_content_brotli.conf
index b857f6e..fc8ad5e 100644
--- a/h5bp/web_performance/pre-compressed_content_brotli.conf
+++ b/h5bp/web_performance/pre-compressed_content_brotli.conf
@@ -8,7 +8,7 @@
 # (!) To make this part relevant, you need to generate encoded files by your
 #     own. Enabling this part will not auto-generate brotlied files.
 #
-# Note that some clients (eg. browsers) require a secure connection to request
+# Note that some clients (e.g. browsers) require a secure connection to request
 # brotli-compressed resources.
 # https://www.chromestatus.com/feature/5420797577396224
 #