diff --git a/py-shiny/README.md b/py-shiny/README.md
index 2aba6dd..6fcdb0e 100644
--- a/py-shiny/README.md
+++ b/py-shiny/README.md
@@ -30,7 +30,7 @@ cd py-shiny
 export DOCKER_DEFAULT_PLATFORM=linux/amd64
 
 # Specify tag
-export TAG=faithful/py-shiny:v1
+export TAG=faithful/py-shiny:main
 
 # Build image
 docker build -t $TAG .
diff --git a/r-shiny/README.md b/r-shiny/README.md
index 5134aaa..380bcfc 100644
--- a/r-shiny/README.md
+++ b/r-shiny/README.md
@@ -30,7 +30,7 @@ cd r-shiny
 export DOCKER_DEFAULT_PLATFORM=linux/amd64
 
 # Specify tag
-export TAG=faithful/r-shiny:v1
+export TAG=faithful/r-shiny:main
 
 # Build image
 docker build -t $TAG .