diff --git a/installer.sh b/installer.sh
index d8187ae..c104484 100644
--- a/installer.sh
+++ b/installer.sh
@@ -20,7 +20,8 @@ sudo apt install -y git python3 python3-pip python3-smbus i2c-tools swig raspi-c
 
 # Installeren van avrdude
 echo -e "${green}Avrdude installeren...${reset}"
-sudo apt-get install bison flex byacc -y
+sudo apt install bison flex byacc -y
+sudo apt remove avrdude* -y
 sudo rm -rf /opt/avrdude-7.0
 cd /opt
 sudo wget http://download.savannah.gnu.org/releases/avrdude/avrdude-7.0.tar.gz
@@ -58,6 +59,7 @@ sudo python3 setup.py install
 
 # Installeren en aanpassen van WiringPi
 echo -e "${green}WiringPi installeren...${reset}"
+sudo apt remove wiringpi* -y
 sudo rm -rf /opt/WiringPi
 cd /opt
 sudo git clone https://github.com/WiringPi/WiringPi
@@ -113,6 +115,7 @@ sudo ./build
 
 # Installeren van WiringPi python
 echo -e "${green}WiringPi python installerenn...${reset}"
+sudo pip3 uninstall wiringpi
 sudo rm -rf /opt/WiringPi-Python
 cd /opt
 sudo git clone --recursive https://github.com/WiringPi/WiringPi-Python.git