diff --git a/requirements.in b/requirements.in
index ecb8f791c1..fba48e81aa 100644
--- a/requirements.in
+++ b/requirements.in
@@ -46,7 +46,7 @@ ijson==3.2.3
 mailchimp3==3.0.21
 ua-parser==0.18.0
 user_agents==2.2.0
-rcssmin==23.3.2
+rcssmin==1.1.2
 
 # We want to use repoze.who.plugins.use_beaker in who.ini with sessions in redis
 # Based on ideas from https://github.com/data-govt-nz/ckanext-security
diff --git a/requirements.txt b/requirements.txt
index 56bd710131..e398d532c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -149,6 +149,8 @@ pyutilib==6.0.0
     # via -r requirements.in
 pyyaml==6.0.1
     # via -r requirements.in
+rcssmin==1.1.2
+    # via -r requirements.in
 rdflib==4.2.1
     # via
     #   -r requirements.in