diff --git a/versions.env b/versions.env
index b924c3f..5867fd8 100644
--- a/versions.env
+++ b/versions.env
@@ -9,7 +9,7 @@
 # =============================================================================
 
 # MUMPS sequential solver (built from source by build-mumps.sh)
-MUMPS_VERSION=5.8.1
+MUMPS_VERSION=5.9.0
 # Bump this when build-mumps.sh changes (or to force a rebuild without
 # changing MUMPS_VERSION). The CI workflow `prebuild-mumps.yml` writes its
 # output to a GH Release tagged `mumps-prebuilt-${MUMPS_VERSION}-r${REV}`,
@@ -22,10 +22,7 @@ MUMPS_PREBUILT_REVISION=4
 # -llapack / -lblas. OpenBLAS bundles both into one libopenblas.a, fixing
 # this with a single source build. Consumed by setup-haskell-env's Alpine
 # branch and by docker/Dockerfile's musl runtime image.
-OPENBLAS_VERSION=0.3.27
-
-# Downloaded dependencies (fetched and built by build scripts)
-PETSC_VERSION=3.24.2
+OPENBLAS_VERSION=0.3.33
 
 # Build tool versions (exact versions for reproducible builds)
 # These are checked at build start - mismatches are warnings, not errors
@@ -38,5 +35,5 @@ GHC_VERSION=9.12.4
 # `_build-matrix.yml` downloads from that exact tag.
 CABAL_PREBUILT_REVISION=2
 RUST_VERSION=1.85.0
-NODE_VERSION=22.17.1
+NODE_VERSION=22.22.3
 ELM_VERSION=0.19.1