diff --git a/.changes/unreleased/Under the Hood-20260522-120000.yaml b/.changes/unreleased/Under the Hood-20260522-120000.yaml
new file mode 100644
index 00000000000..7c27e4b7c2c
--- /dev/null
+++ b/.changes/unreleased/Under the Hood-20260522-120000.yaml	
@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Remove exact version pin for libpq-dev in Dockerfile to prevent recurring build failures when Debian publishes PostgreSQL security updates.
+time: 2026-05-22T12:00:00.000000Z
+custom:
+  Author: OliverCostello1
+  Issue: "12808"
\ No newline at end of file
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2d7d7762a65..6a866ef93b6 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -7,7 +7,9 @@ RUN apt-get update \
   && apt-get install -y --no-install-recommends \
     build-essential=12.9 \
     ca-certificates=20210119 \
-    libpq-dev=13.23-0+deb11u3 \
+    # libpq-dev is intentionally not pinned: Debian removes old patch versions when publishing
+    # security updates, which breaks builds. The apt-mark hold below prevents dist-upgrade drift.
+    libpq-dev \
     make=4.3-4.1 \
     openssh-client=1:8.4p1-5+deb11u3 \
     software-properties-common=0.96.20.2-2.1 \
@@ -85,7 +87,7 @@ FROM dbt-core AS dbt-third-party
 ARG dbt_third_party
 
 RUN if [ "$dbt_third_party" ]; then \
-        python -m pip install --no-cache-dir "${dbt_third_party}"; \
-    else \
-        echo "No third party adapter provided"; \
-    fi \
+    python -m pip install --no-cache-dir "${dbt_third_party}"; \
+  else \
+    echo "No third party adapter provided"; \
+  fi \
\ No newline at end of file