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index 0728e1dd..912f046a 100644
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diff --git a/02-coords.html b/02-coords.html
index a719a748..43574006 100644
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diff --git a/03-transform.html b/03-transform.html
index 6b921dba..9b94520c 100644
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diff --git a/04-motion.html b/04-motion.html
index 7198b918..53f39cbc 100644
--- a/04-motion.html
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 <p>Previously, we ran a query on the Gaia server, downloaded data for
 roughly 140,000 stars, transformed the coordinates to the GD-1 reference
@@ -451,7 +451,7 @@ <h3 class="callout-title">Exercise (10 minutes)<a class="anchor" aria-label="anc
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 <p>The most noticeable issue is that some of the parallax values are
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diff --git a/05-select.html b/05-select.html
index 1af7bd71..b568f824 100644
--- a/05-select.html
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 <p>Previously, we ran a query on the Gaia server, downloaded data for
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index e19628ad..8f4512cf 100644
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 </button>
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 <div class="accordion-body">
 <p>In the previous episode, we define a rectangle around stars in GD-1
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diff --git a/07-photo.html b/07-photo.html
index 965a03a1..3bd28ed5 100644
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diff --git a/08-plot.html b/08-plot.html
index 671343ca..d3a825a8 100644
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diff --git a/404.html b/404.html
index 5c9eb438..f478a4ea 100644
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index eedb8b45..e524abcc 100644
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diff --git a/LICENSE.html b/LICENSE.html
index 8bc1a904..c3b4634b 100644
--- a/LICENSE.html
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diff --git a/aio.html b/aio.html
index d79ac65e..ca17798c 100644
--- a/aio.html
+++ b/aio.html
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 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
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 <div class="accordion-body">
 <p>Previously, we ran a query on the Gaia server, downloaded data for
 roughly 140,000 stars, transformed the coordinates to the GD-1 reference
@@ -3330,7 +3330,7 @@ <h3 class="callout-title">Exercise (10 minutes)<a class="anchor" aria-label="anc
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 <div class="accordion-body">
 <p>The most noticeable issue is that some of the parallax values are
 negative, which seems non-physical.</p>
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 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
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 <div class="accordion-body">
 <p>Previously, we ran a query on the Gaia server, downloaded data for
 roughly 140,000 stars, and saved the data in a FITS file. We then
@@ -4139,7 +4139,7 @@ <h3 class="callout-title">Exercise (5 minutes)<a class="anchor" aria-label="anch
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 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
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 <div class="accordion-body">
 <p>In the previous episode, we define a rectangle around stars in GD-1
 in spatial coordinates and in proper motion which we transformed into
@@ -5339,7 +5339,7 @@ <h3 class="callout-title">Exercise (15 minutes)<a class="anchor" aria-label="anc
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index 8f320578..be1d4585 100644
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index 78085c34..bca2169d 100644
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 <p>Previously, we ran a query on the Gaia server, downloaded data for
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diff --git a/pkgdown.yml b/pkgdown.yml
index 9979c06a..d927bd9b 100644
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