diff --git a/doc/build.md b/doc/build.md
index 1cea9b979..158c0ed8f 100644
--- a/doc/build.md
+++ b/doc/build.md
@@ -14,7 +14,7 @@ What's working so far?
 
 ## Requirements
 
-* rust 1.31+ (use [rustup]((https://www.rustup.rs/))- i.e. `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
+* rust 1.34+ (use [rustup]((https://www.rustup.rs/))- i.e. `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
   * if rust is already installed, you can simply update version with `rustup update`
 * clang
 * ncurses and libs (ncurses, ncursesw5)
diff --git a/doc/build_ES.md b/doc/build_ES.md
index 6a22a7190..6d60de979 100644
--- a/doc/build_ES.md
+++ b/doc/build_ES.md
@@ -12,7 +12,7 @@ El lenguaje de programación de Grin `rust` ha compilado metas para la mayoría
 
 ## Requisitos
 
-* rust 1.31+ (usa [rustup]((https://www.rustup.rs/))- por ejemplo, `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
+* rust 1.34+ (usa [rustup]((https://www.rustup.rs/))- por ejemplo, `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
   * Si rust está instalado, puede simplemente actualizar la versión con  `rustup update`
 * clang
 * ncurses y libs (ncurses, ncursesw5)
diff --git a/doc/build_JP.md b/doc/build_JP.md
index 9b9db1066..e276b447b 100644
--- a/doc/build_JP.md
+++ b/doc/build_JP.md
@@ -13,7 +13,7 @@ grinのプログラミング言語である`rust`はほぼ全ての環境に対
 
 ## 要件
 
-* rust 1.31+ ([rustup]((https://www.rustup.rs/))を使えば`curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`でインストール可)
+* rust 1.34+ ([rustup]((https://www.rustup.rs/))を使えば`curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`でインストール可)
   * rustをインストール済みの場合は`rustup update`を実行
 * clang
 * ncursesとそのライブラリ (ncurses, ncursesw5)
diff --git a/doc/build_KR.md b/doc/build_KR.md
index 18360aa6e..fbfeee1c4 100644
--- a/doc/build_KR.md
+++ b/doc/build_KR.md
@@ -14,7 +14,7 @@ Grin 프로그래밍 언어는 `rust`로 대부분의 플랫폼들에서 빌드
 
 ## 요구사항
 
-* rust 1.31 버전 이상  (다음 명령어를 사용하세요. [rustup]((https://www.rustup.rs/))- 예.) `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
+* rust 1.34 버전 이상  (다음 명령어를 사용하세요. [rustup]((https://www.rustup.rs/))- 예.) `curl https://sh.rustup.rs -sSf | sh; source $HOME/.cargo/env`)
 
   * 만약 rust 가 설치되어 있다면, 다음 명령어를 사용해서 업데이트 할 수 있습니다.
     `rustup update`
diff --git a/etc/Dockerfile b/etc/Dockerfile
index 5b45ba5b1..abd8ecdfa 100644
--- a/etc/Dockerfile
+++ b/etc/Dockerfile
@@ -1,7 +1,7 @@
 # Multistage docker build, requires docker 17.05
 
 # builder stage
-FROM rust:1.31 as builder
+FROM rust:1.35 as builder
 
 RUN set -ex && \
     apt-get update && \
diff --git a/etc/Dockerfile.floonet b/etc/Dockerfile.floonet
index 89c60e0ba..6a9bea267 100644
--- a/etc/Dockerfile.floonet
+++ b/etc/Dockerfile.floonet
@@ -1,7 +1,7 @@
 # Multistage docker build, requires docker 17.05
 
 # builder stage
-FROM rust:1.31 as builder
+FROM rust:1.35 as builder
 
 RUN set -ex && \
     apt-get update && \