diff --git a/redmine/Dockerfile b/redmine/Dockerfile
index 916d891..5c8eb43 100644
--- a/redmine/Dockerfile
+++ b/redmine/Dockerfile
@@ -1,4 +1,4 @@
-FROM redmine:4.2.8
+FROM redmine:5.1.2
 
 ENV REDMINE_PATH=/usr/src/redmine \
     REDMINE_LOCAL_PATH=/var/local/redmine
diff --git a/redmine/plugins/redmine_banner-0.3.4.zip b/redmine/plugins/redmine_banner-0.3.4.zip
deleted file mode 100644
index 36f8052..0000000
Binary files a/redmine/plugins/redmine_banner-0.3.4.zip and /dev/null differ
diff --git a/redmine/plugins/redmine_checklists-3_1_21-light.zip b/redmine/plugins/redmine_checklists-3_1_21-light.zip
deleted file mode 100644
index c557c63..0000000
Binary files a/redmine/plugins/redmine_checklists-3_1_21-light.zip and /dev/null differ
diff --git a/redmine/plugins/redmine_checklists-3_1_23-light.zip b/redmine/plugins/redmine_checklists-3_1_23-light.zip
new file mode 100644
index 0000000..c201420
Binary files /dev/null and b/redmine/plugins/redmine_checklists-3_1_23-light.zip differ
diff --git a/redmine/themes/PurpleMine2-2.15.0.zip b/redmine/themes/PurpleMine2-2.16.2.zip
similarity index 83%
rename from redmine/themes/PurpleMine2-2.15.0.zip
rename to redmine/themes/PurpleMine2-2.16.2.zip
index 6cd73e4..12979ff 100644
Binary files a/redmine/themes/PurpleMine2-2.15.0.zip and b/redmine/themes/PurpleMine2-2.16.2.zip differ
diff --git a/redmine/themes/circle_theme-2_1_5.zip b/redmine/themes/circle_theme-2_1_5.zip
deleted file mode 100644
index df0b58e..0000000
Binary files a/redmine/themes/circle_theme-2_1_5.zip and /dev/null differ