diff --git a/configs/common/packages.yaml b/configs/common/packages.yaml
index 4e78711ea..1deb17e35 100644
--- a/configs/common/packages.yaml
+++ b/configs/common/packages.yaml
@@ -214,6 +214,9 @@ packages:
   ## To avoid duplicate packages
   #py-jinja2:
   #  require: '@3.1.2'
+  # https://github.com/JCSDA/spack-stack/issues/1276
+  py-matplotlib:
+     require: '@3.7.4'
   py-meson-python:
      require: '@0.15.0'
   # Comment out for now until build problems are solved
@@ -226,9 +229,10 @@ packages:
     require: '@1.5.8 ~mpi'
   # py-numpy@1.26 causes many build problems with older Python packages
   # also check Nautilus site config when making changes here
+  # https://github.com/JCSDA/spack-stack/issues/1276
   py-numpy:
     require:
-    - '@:1.25'
+    - '@:1.23.5'
   py-pandas:
     require: '+excel'
   py-pybind11:
diff --git a/configs/sites/tier1/acorn/packages_intel.yaml b/configs/sites/tier1/acorn/packages_intel.yaml
index 34065c870..5868e5481 100644
--- a/configs/sites/tier1/acorn/packages_intel.yaml
+++ b/configs/sites/tier1/acorn/packages_intel.yaml
@@ -31,7 +31,7 @@
       - '@1.2.1 ~mkl'
     py-numpy:
       require::
-      - '@:1.25 ^openblas'
+      - '@:1.23 ^openblas'
     # *DH
     eckit:
       require:
diff --git a/configs/sites/tier1/aws-pcluster/packages_intel.yaml b/configs/sites/tier1/aws-pcluster/packages_intel.yaml
index 1363ff58f..7fb3d8477 100644
--- a/configs/sites/tier1/aws-pcluster/packages_intel.yaml
+++ b/configs/sites/tier1/aws-pcluster/packages_intel.yaml
@@ -31,5 +31,5 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
diff --git a/configs/sites/tier1/derecho/packages_intel.yaml b/configs/sites/tier1/derecho/packages_intel.yaml
index f37ddcacf..dc534a575 100644
--- a/configs/sites/tier1/derecho/packages_intel.yaml
+++ b/configs/sites/tier1/derecho/packages_intel.yaml
@@ -37,6 +37,6 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
 
diff --git a/configs/sites/tier1/gaea-c5/packages.yaml b/configs/sites/tier1/gaea-c5/packages.yaml
index da5173fad..6e13f710e 100644
--- a/configs/sites/tier1/gaea-c5/packages.yaml
+++ b/configs/sites/tier1/gaea-c5/packages.yaml
@@ -35,7 +35,7 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
 
 ### All other external packages listed alphabetically
diff --git a/configs/sites/tier1/gaea-c6/packages.yaml b/configs/sites/tier1/gaea-c6/packages.yaml
index 92f7d0a7c..75473846c 100644
--- a/configs/sites/tier1/gaea-c6/packages.yaml
+++ b/configs/sites/tier1/gaea-c6/packages.yaml
@@ -34,7 +34,7 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
 
 ### All other external packages listed alphabetically
diff --git a/configs/sites/tier1/hera/packages_intel.yaml b/configs/sites/tier1/hera/packages_intel.yaml
index 4f8025c5f..5ac52dd8b 100644
--- a/configs/sites/tier1/hera/packages_intel.yaml
+++ b/configs/sites/tier1/hera/packages_intel.yaml
@@ -30,7 +30,7 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
   zlib-ng:
     require:
diff --git a/configs/sites/tier1/hercules/packages_intel.yaml b/configs/sites/tier1/hercules/packages_intel.yaml
index 78339c1c5..eb4a22dc7 100644
--- a/configs/sites/tier1/hercules/packages_intel.yaml
+++ b/configs/sites/tier1/hercules/packages_intel.yaml
@@ -30,4 +30,4 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
diff --git a/configs/sites/tier1/nautilus/packages_gcc.yaml b/configs/sites/tier1/nautilus/packages_gcc.yaml
index 841ff05b1..723bfd315 100644
--- a/configs/sites/tier1/nautilus/packages_gcc.yaml
+++ b/configs/sites/tier1/nautilus/packages_gcc.yaml
@@ -31,4 +31,4 @@ packages:
     - '@1.2.1 +mkl'
   py-numpy:
     require::
-    - '@:1.25 ^intel-oneapi-mkl'
+    - '@:1.23 ^intel-oneapi-mkl'
diff --git a/configs/sites/tier1/noaa-aws/packages_intel.yaml b/configs/sites/tier1/noaa-aws/packages_intel.yaml
index 995404d2d..2c98fa98f 100644
--- a/configs/sites/tier1/noaa-aws/packages_intel.yaml
+++ b/configs/sites/tier1/noaa-aws/packages_intel.yaml
@@ -30,5 +30,5 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
diff --git a/configs/sites/tier1/noaa-azure/packages_intel.yaml b/configs/sites/tier1/noaa-azure/packages_intel.yaml
index 995404d2d..2c98fa98f 100644
--- a/configs/sites/tier1/noaa-azure/packages_intel.yaml
+++ b/configs/sites/tier1/noaa-azure/packages_intel.yaml
@@ -30,5 +30,5 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
diff --git a/configs/sites/tier1/noaa-gcloud/packages_intel.yaml b/configs/sites/tier1/noaa-gcloud/packages_intel.yaml
index 995404d2d..2c98fa98f 100644
--- a/configs/sites/tier1/noaa-gcloud/packages_intel.yaml
+++ b/configs/sites/tier1/noaa-gcloud/packages_intel.yaml
@@ -30,5 +30,5 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
   # *DH
diff --git a/configs/sites/tier1/orion/packages_intel.yaml b/configs/sites/tier1/orion/packages_intel.yaml
index 88131d85c..8c1e33385 100644
--- a/configs/sites/tier1/orion/packages_intel.yaml
+++ b/configs/sites/tier1/orion/packages_intel.yaml
@@ -32,4 +32,4 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
diff --git a/configs/sites/tier1/s4/packages.yaml b/configs/sites/tier1/s4/packages.yaml
index 3650e0678..e0312b799 100644
--- a/configs/sites/tier1/s4/packages.yaml
+++ b/configs/sites/tier1/s4/packages.yaml
@@ -33,7 +33,7 @@ packages:
     - '@1.2.1 ~mkl'
   py-numpy:
     require::
-    - '@:1.25 ^openblas'
+    - '@:1.23 ^openblas'
 
 ### All other external packages listed alphabetically
   autoconf: