diff --git a/.github/renovate.json b/.github/renovate.json
index c54154b..0b3e5d8 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -5,7 +5,7 @@
     "helpers:pinGitHubActionDigestsToSemver"
   ],
   "timezone": "Europe/London",
-  "schedule": ["after 9am and before 5pm every weekday"],
+  "schedule": ["after 5am and before 5pm every weekday"],
   "dependencyDashboard": true,
   "assignees": ["jimboid"],
   "minimumReleaseAge": "3 days",
@@ -15,5 +15,34 @@
       "groupName": "GitHub Actions",
       "addLabels": ["ci", "dependencies"]
     }
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/(^|/)Dockerfile[^/]*$/"
+      ],
+      "matchStringsStrategy": "recursive",
+      "matchStrings": [
+        "pip3? install[\\s\\S]*?(?<packages>(?:[\\w.-]+==[\\w.-]+[\\s\\\\]*)+)",
+        "(?<depName>[\\w.-]+)==(?<currentValue>[\\w.-]+)"
+      ],
+      "datasourceTemplate": "pypi",
+      "versioningTemplate": "pep440"
+    },
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/(^|/)Dockerfile[^/]*$/"
+      ],
+      "matchStringsStrategy": "recursive",
+      "matchStrings": [
+        "(?:mamba|conda) install[\\s\\S]*?(?<packages>(?:(?:[\\w-]+::)?[\\w.-]+=[\\w.-]+[\\s\\\\]*)+)",
+        "(?:(?<channel>[\\w-]+)::)?(?<depName>[\\w.-]+)=(?<currentValue>[\\w.-]+)"
+      ],
+      "datasourceTemplate": "conda",
+      "registryUrlTemplate": "https://api.anaconda.org/package/{{#if channel}}{{channel}}{{else}}conda-forge{{/if}}/",
+      "versioningTemplate": "pep440"
+    }
   ]
 }
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 0171e95..2ec7a75 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -9,7 +9,10 @@ USER $NB_USER
 WORKDIR $HOME
 
 # Install workshop deps
-RUN mamba install matplotlib numpy ipywidgets -y
+RUN conda install -y -c conda-forge \
+    conda-forge::matplotlib=3.11.1 \
+    conda-forge::numpy=2.5.3 \
+    conda-forge::ipywidgets=8.1.9
 
 # Get workshop files and move them to jovyan directory.
 COPY --chown=1000:100 . .