diff --git a/src/kemal/cli.cr b/src/kemal/cli.cr
index 2b9e97d..86dd8cf 100644
--- a/src/kemal/cli.cr
+++ b/src/kemal/cli.cr
@@ -13,7 +13,7 @@ module Kemal
       configure_ssl
     end
 
-    def parse
+    private def parse
       OptionParser.parse! do |opts|
         opts.on("-b HOST", "--bind HOST", "Host to bind (defaults to 0.0.0.0)") do |host_binding|
           @config.host_binding = host_binding
@@ -38,7 +38,7 @@ module Kemal
       end
     end
 
-    def configure_ssl
+    private def configure_ssl
       {% if !flag?(:without_openssl) %}
       if @ssl_enabled
         unless @key_file
@@ -57,7 +57,7 @@ module Kemal
     {% end %}
     end
 
-    def read_env
+    private def read_env
       @config.env = ENV["KEMAL_ENV"] if ENV.has_key?("KEMAL_ENV")
     end
   end
diff --git a/src/kemal/common_exception_handler.cr b/src/kemal/common_exception_handler.cr
index 5682c54..184e1b1 100644
--- a/src/kemal/common_exception_handler.cr
+++ b/src/kemal/common_exception_handler.cr
@@ -19,7 +19,7 @@ module Kemal
       end
     end
 
-    def call_exception_with_status_code(context, exception, status_code)
+    private def call_exception_with_status_code(context, exception, status_code)
       if Kemal.config.error_handlers.has_key?(status_code)
         context.response.content_type = "text/html" unless context.response.headers.has_key?("Content-Type")
         context.response.print Kemal.config.error_handlers[status_code].call(context, exception)
diff --git a/src/kemal/param_parser.cr b/src/kemal/param_parser.cr
index dfb93e2..afa9e76 100644
--- a/src/kemal/param_parser.cr
+++ b/src/kemal/param_parser.cr
@@ -44,7 +44,7 @@ module Kemal
     end
     {% end %}
 
-    def parse_body
+    private def parse_body
       content_type = @request.headers["Content-Type"]?
       return unless content_type
       if content_type.try(&.starts_with?(URL_ENCODED_FORM))
@@ -57,11 +57,11 @@ module Kemal
       end
     end
 
-    def parse_query
+    private def parse_query
       @query = parse_part(@request.query)
     end
 
-    def parse_url
+    private def parse_url
       if params = @request.url_params
         params.each do |key, value|
           @url[key.as(String)] = unescape_url_param(value).as(String)
@@ -69,7 +69,7 @@ module Kemal
       end
     end
 
-    def parse_file_upload
+    private def parse_file_upload
       HTTP::FormData.parse(@request) do |field, data, meta, headers|
         next unless meta
         filename = meta.filename
@@ -89,7 +89,7 @@ module Kemal
     # If request body is a JSON Hash then all the params are parsed and added into `params`.
     # If request body is a JSON Array it's added into `params` as `_json` and can be accessed
     # like params["_json"]
-    def parse_json
+    private def parse_json
       return unless @request.body && @request.headers["Content-Type"]?.try(&.starts_with?(APPLICATION_JSON))
 
       body = @request.body.not_nil!.gets_to_end
@@ -103,7 +103,7 @@ module Kemal
       end
     end
 
-    def parse_part(part : IO?)
+    private def parse_part(part : IO?)
       if part
         HTTP::Params.parse(part.gets_to_end)
       else
@@ -111,7 +111,7 @@ module Kemal
       end
     end
 
-    def parse_part(part : String?)
+    private def parse_part(part : String?)
       if part
         HTTP::Params.parse(part.to_s)
       else
diff --git a/src/kemal/route_handler.cr b/src/kemal/route_handler.cr
index 9031b41..e428179 100644
--- a/src/kemal/route_handler.cr
+++ b/src/kemal/route_handler.cr
@@ -30,7 +30,7 @@ module Kemal
     end
 
     # Processes the route if it's a match. Otherwise renders 404.
-    def process_request(context)
+    private def process_request(context)
       raise Kemal::Exceptions::RouteNotFound.new(context) unless context.route_defined?
       route = context.route_lookup.payload.as(Route)
       content = route.handler.call(context)
diff --git a/src/kemal/static_file_handler.cr b/src/kemal/static_file_handler.cr
index bd1b8df..3b7f033 100644
--- a/src/kemal/static_file_handler.cr
+++ b/src/kemal/static_file_handler.cr
@@ -79,7 +79,17 @@ module Kemal
       end
     end
 
-    def multipart(file, env)
+    def etag(context, file_path)
+      etag = %{W/"#{File.lstat(file_path).mtime.epoch.to_s}"}
+      context.response.headers["ETag"] = etag
+      return false if !context.request.headers["If-None-Match"]? || context.request.headers["If-None-Match"] != etag
+      context.response.headers.delete "Content-Type"
+      context.response.content_length = 0
+      context.response.status_code = 304 # not modified
+      return true
+    end
+
+    private def multipart(file, env)
       # See http://httpwg.org/specs/rfc7233.html
       fileb = file.size
 
@@ -130,15 +140,5 @@ module Kemal
         IO.copy(file, env.response)
       end
     end
-
-    def etag(context, file_path)
-      etag = %{W/"#{File.lstat(file_path).mtime.epoch.to_s}"}
-      context.response.headers["ETag"] = etag
-      return false if !context.request.headers["If-None-Match"]? || context.request.headers["If-None-Match"] != etag
-      context.response.headers.delete "Content-Type"
-      context.response.content_length = 0
-      context.response.status_code = 304 # not modified
-      return true
-    end
   end
 end