diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aad0d23..bb8eaa2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,10 @@ jobs:
   test:
     strategy:
       matrix:
-        pg: [17, 16, 15, 14, 13, 12, 11, 10, 9.6, 9.5, 9.4, 9.3]
+        # Floor matches cat_tools's own declared PostgreSQL requirement
+        # (12.0, see its META.in.json) -- extension_drop depends on
+        # cat_tools, so it was never really going to work below that either.
+        pg: [17, 16, 15, 14, 13, 12]
     name: 🐘 PostgreSQL ${{ matrix.pg }}
     runs-on: ubuntu-latest
     container: pgxn/pgxn-tools
diff --git a/HISTORY.asc b/HISTORY.asc
index f483708..0cecdda 100644
--- a/HISTORY.asc
+++ b/HISTORY.asc
@@ -1,5 +1,11 @@
 1.0.0
 -----
+== Drop support for PostgreSQL versions before 12
+extension_drop depends on cat_tools, which already requires PostgreSQL
+12+. A fresh install of extension_drop was already broken below that
+too (a cat_tools function it calls needs PG11+ internally) -- this
+just makes the declared floor honest.
+
 == Remove redundant client_min_messages handling from install script
 `CREATE EXTENSION` already raises `client_min_messages` to `WARNING` for
 the install script (only-raising, so a stricter caller is respected) and
diff --git a/META.in.json b/META.in.json
index 71aa541..fdd7504 100644
--- a/META.in.json
+++ b/META.in.json
@@ -72,13 +72,13 @@
     "X_comment": "Optional. 'prereqs': Prerequisits for the distribution. http://pgxn.org/spec/#prereqs",
     "X_comment": "Valid keys for 'prereqs' are configure, build, runtime, or test.",
     "X_comment": "Valid keys for 'requires' are requires, recommends, suggests, or conflicts.",
-    "X_comment": "Requires event_triggers, introduced in 9.3",
+    "X_comment": "PostgreSQL floor matches cat_tools's own declared requirement",
     "X_comment": "cat_tools: requires extension support, added in 0.2.1",
     "prereqs": {
 
         "build": {
             "requires": {
-                "PostgreSQL": "9.3.0",
+                "PostgreSQL": "12.0",
                 "cat_tools": "0.2.1"
             }
         },
diff --git a/META.json b/META.json
index ba237c7..9ce2b17 100644
--- a/META.json
+++ b/META.json
@@ -72,13 +72,13 @@
     "X_comment": "Optional. 'prereqs': Prerequisits for the distribution. http://pgxn.org/spec/#prereqs",
     "X_comment": "Valid keys for 'prereqs' are configure, build, runtime, or test.",
     "X_comment": "Valid keys for 'requires' are requires, recommends, suggests, or conflicts.",
-    "X_comment": "Requires event_triggers, introduced in 9.3",
+    "X_comment": "PostgreSQL floor matches cat_tools's own declared requirement",
     "X_comment": "cat_tools: requires extension support, added in 0.2.1",
     "prereqs": {
 
         "build": {
             "requires": {
-                "PostgreSQL": "9.3.0",
+                "PostgreSQL": "12.0",
                 "cat_tools": "0.2.1"
             }
         },