diff --git a/certbot-dns-dnsimple/snap/hooks/install b/certbot-dns-dnsimple/snap/hooks/install
index 8b2d3ad4e..f3115d391 100644
--- a/certbot-dns-dnsimple/snap/hooks/install
+++ b/certbot-dns-dnsimple/snap/hooks/install
@@ -1 +1 @@
-snapctl set first_install="true"
+snapctl set first-install="true"
diff --git a/certbot-dns-dnsimple/snap/hooks/post-refresh b/certbot-dns-dnsimple/snap/hooks/post-refresh
index d50e6b35e..d0c05c43f 100644
--- a/certbot-dns-dnsimple/snap/hooks/post-refresh
+++ b/certbot-dns-dnsimple/snap/hooks/post-refresh
@@ -1,8 +1,8 @@
 #!/bin/sh -e
 
-snapctl get first_install
+snapctl get first-install
 if [ "$?" -eq "true"]; then
-    snapctl set first_install="false"
+    snapctl set first-install="false"
     exit 0
 fi