diff --git a/.github/workflows/conda.yaml b/.github/workflows/conda.yaml
index 48a7b1494..edf37701b 100644
--- a/.github/workflows/conda.yaml
+++ b/.github/workflows/conda.yaml
@@ -11,8 +11,8 @@ on:
   #   branches: [ main ]
 
 env:
-  # First version including a macOS arm64 distribution
-  GAMS_VERSION: 43.4.1
+  # Oldest version that can reliably be downloaded
+  GAMS_VERSION: 48.6.1
 
 jobs:
   conda:
diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index a77a778b7..376d204c9 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -21,8 +21,8 @@ env:
   depth: 100  # See description in pytest.yaml
   # Version used until 2024-11-20; disabled
   # gams-version: 29.1.0
-  # First version including a macOS arm64 distribution
-  gams-version: 43.4.1
+  # Oldest version that can reliably be downloaded
+  gams-version: 48.6.1
   os: ubuntu-latest
   python-version: "3.13"
 
diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index ee30b69d8..10ce5ae5d 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -21,7 +21,7 @@ defaults:
     shell: bash
 
 env:
-  GAMS_VERSION: 45.7.0 # Oldest version of gamsapi allowed by pyproject.toml
+  GAMS_VERSION: 48.6.1 # Oldest version of GAMS that can reliably be downloaded
   depth: 100  # Must be large enough to include the most recent release
   label: "safe to test"  # Label that must be applied to run on PRs from forks
   python-version: "3.13"  # For non-matrixed jobs
diff --git a/doc/requirements.in b/doc/requirements.in
index 07504914e..d7e3b9593 100644
--- a/doc/requirements.in
+++ b/doc/requirements.in
@@ -3,6 +3,7 @@
 
 gitpython==3.1.44
 numpydoc==1.8.0
-sphinx==8.2.1
+pandas==2.2.3
+sphinx==8.2.3
 sphinx-rtd-theme==3.0.2
 sphinxcontrib-bibtex==2.6.3
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 540e3f774..709dcc43e 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,9 +1,5 @@
-#
-# This file is autogenerated by pip-compile with Python 3.11
-# by the following command:
-#
-#    pip-compile --allow-unsafe --output-file=doc/requirements.txt --strip-extras doc/requirements.in
-#
+# This file was autogenerated by uv via the following command:
+#    uv pip compile --strip-extras doc/requirements.in -o doc/requirements.txt
 alabaster==0.7.16
     # via sphinx
 babel==2.16.0
@@ -21,7 +17,7 @@ docutils==0.20.1
 gitdb==4.0.10
     # via gitpython
 gitpython==3.1.44
-    # via -r requirements.in
+    # via -r doc/requirements.in
 idna==3.7
     # via requests
 imagesize==1.4.1
@@ -32,10 +28,14 @@ latexcodec==2.0.1
     # via pybtex
 markupsafe==2.1.3
     # via jinja2
+numpy==2.3.0
+    # via pandas
 numpydoc==1.8.0
-    # via -r requirements.in
+    # via -r doc/requirements.in
 packaging==23.1
     # via sphinx
+pandas==2.2.3
+    # via -r doc/requirements.in
 pybtex==0.24.0
     # via
     #   pybtex-docutils
@@ -44,34 +44,41 @@ pybtex-docutils==1.0.2
     # via sphinxcontrib-bibtex
 pygments==2.18.0
     # via sphinx
+python-dateutil==2.9.0.post0
+    # via pandas
+pytz==2025.2
+    # via pandas
 pyyaml==6.0.1
     # via pybtex
-requests==2.32.0
+requests==2.32.4
     # via sphinx
 roman-numerals-py==3.1.0
     # via sphinx
+setuptools==80.9.0
+    # via sphinxcontrib-bibtex
 six==1.16.0
     # via
     #   latexcodec
     #   pybtex
+    #   python-dateutil
 smmap==5.0.0
     # via gitdb
 snowballstemmer==2.2.0
     # via sphinx
-sphinx==8.2.1
+sphinx==8.2.3
     # via
-    #   -r requirements.in
+    #   -r doc/requirements.in
     #   numpydoc
     #   sphinx-rtd-theme
     #   sphinxcontrib-bibtex
     #   sphinxcontrib-jquery
     #   sphinxcontrib-serializinghtml
 sphinx-rtd-theme==3.0.2
-    # via -r requirements.in
+    # via -r doc/requirements.in
 sphinxcontrib-applehelp==2.0.0
     # via sphinx
 sphinxcontrib-bibtex==2.6.3
-    # via -r requirements.in
+    # via -r doc/requirements.in
 sphinxcontrib-devhelp==2.0.0
     # via sphinx
 sphinxcontrib-htmlhelp==2.1.0
@@ -86,5 +93,7 @@ sphinxcontrib-serializinghtml==1.1.9
     # via sphinx
 tabulate==0.9.0
     # via numpydoc
-urllib3==2.2.2
+tzdata==2025.2
+    # via pandas
+urllib3==2.5.0
     # via requests