diff --git a/Dockerfile b/Dockerfile
index 6be3c33..b991956 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) + 2)) \
+ && cmake --build . --target install -j $(nproc) \
  && strip /usr/src/telegram-bot-api/bin/telegram-bot-api
 
 FROM alpine:3.12