diff --git a/scripts/install b/scripts/install
index 0424dca..2092215 100755
--- a/scripts/install
+++ b/scripts/install
@@ -22,8 +22,6 @@ ynh_npm install --global npm@latest
 # Install Yarn
 ynh_npm install --global yarn
 
-npm cache clean --force
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -56,7 +54,7 @@ pushd $install_dir
     ynh_use_nodejs
 
 	ynh_script_progression --message="Fetching Yarn dev dependencies... This can be very long, be patient !" --weight=18
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --network-timeout=30000
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --network-timeout=30000 --legacy-peer-deps
 
 	# fix issue "Type error: Cannot find module 'pulltorefreshjs' or its corresponding type declarations."
 	ynh_exec_as $app $ynh_node_load_PATH $ynh_npm install pulltorefreshjs@latest
diff --git a/scripts/upgrade b/scripts/upgrade
index 7c635c9..2949fd9 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -31,8 +31,6 @@ ynh_npm install --global npm@latest
 # Install Yarn
 ynh_npm install --global yarn
 
-npm cache clean --force
-
 #=================================================
 # "REBUILD" THE APP (DEPLOY NEW SOURCES, RERUN NPM BUILD...)
 #=================================================
@@ -56,7 +54,7 @@ pushd $install_dir
     ynh_use_nodejs
 
 	ynh_script_progression --message="Fetching Yarn dev dependencies... This can be very long, be patient !" --weight=18
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --network-timeout=30000
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --network-timeout=30000 --legacy-peer-deps
 
 	# fix issue "Type error: Cannot find module 'pulltorefreshjs' or its corresponding type declarations."
 	ynh_exec_as $app $ynh_node_load_PATH $ynh_npm install pulltorefreshjs@latest