diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index e6e1e99..0138d59 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -44,7 +44,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/386,linux/amd64
+          platforms: linux/386,linux/amd64,linux/arm/v7,linux/arm64
           push: true
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache
diff --git a/Dockerfile b/Dockerfile
index b991956..6be3c33 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ COPY telegram-bot-api /usr/src/telegram-bot-api
 RUN mkdir -p build \
  && cd build \
  && cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=.. .. \
- && cmake --build . --target install -j $(nproc) \
+ && cmake --build . --target install -j $(($(nproc) + 2)) \
  && strip /usr/src/telegram-bot-api/bin/telegram-bot-api
 
 FROM alpine:3.12
diff --git a/Makefile b/Makefile
index 9f65d74..5bd786d 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ image_tag := $(shell date +%Y%m%d)
 
 .PHONY: update
 update:
-	git submodule update --init --recursive --remote --merge
+	git submodule -q foreach git pull -q origin master
 
 .PHONY: build
 build:
diff --git a/example/README.md b/example/README.md
index 2d26dee..f29a9e8 100644
--- a/example/README.md
+++ b/example/README.md
@@ -1,6 +1,6 @@
 # Example
 
-By default [tdlib/telegram-bot-api](https://github.com/tdlib/telegram-bot-api) 
+By default, [tdlib/telegram-bot-api](https://github.com/tdlib/telegram-bot-api) 
 doesn't provide possibility to download files from API (without local-mode) 
 so that's meat you will need to expose files somehow differently, for example by nginx.