diff --git a/challenges/002.md b/challenges/002.md
index 90d9455..63f39f7 100644
--- a/challenges/002.md
+++ b/challenges/002.md
@@ -40,14 +40,27 @@ lscpu | grep -P '(?=.*avx )(?=.*sse4.2 )(?=.*cx16 )(?=.*popcnt )' > /dev/null \
 
 ##### Install developer tools:
 ```
-sudo apt install -y git binutils-dev libcurl4-openssl-dev zlib1g-dev libdw-dev libiberty-dev cmake gcc g++ python3 docker.io protobuf-compiler libssl-dev pkg-config clang llvm cargo
-```
-
-If you have problems with installing python or docker.io on Ubuntu, try this command:  
-
-```
-sudo apt install python3
-sudo apt install docker-ce
+sudo apt install -y git binutils-dev libcurl4-openssl-dev zlib1g-dev libdw-dev libiberty-dev cmake gcc g++ python docker.io protobuf-compiler libssl-dev pkg-config clang llvm
+```
+
+If you have problems installing on Ubuntu, try these commands:
+
+```
+sudo apt-get update
+sudo apt-get remove docker docker-engine docker.io containerd runc
+sudo apt-get update
+sudo apt-get install \
+    ca-certificates \
+    curl \
+    gnupg \
+    lsb-release
+sudo mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+sudo apt-get update
+sudo apt install -y git binutils-dev libcurl4-openssl-dev zlib1g-dev libdw-dev libiberty-dev cmake gcc g++ python3 docker-ce protobuf-compiler libssl-dev pkg-config clang llvm
 ```
 
 #####  Install Python pip: