diff --git a/action.yml b/action.yml
index 867f1bb..57a7048 100644
--- a/action.yml
+++ b/action.yml
@@ -81,7 +81,7 @@ runs:
         prs=$(curl -X 'GET' \
                 "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls?state=open&sort=recentupdate" \
                 -H "Authorization: token $GITHUB_TOKEN" \
-                -H 'accept: application/json')
+                -H 'Accept: application/json')
 
         pr_number=$(echo "$prs" |
                 jq --arg head_ref "$head_ref" '.[] | select(.head.ref == $head_ref) | .number')
diff --git a/comment_on_pr.sh b/comment_on_pr.sh
index e7a7487..a5446e8 100755
--- a/comment_on_pr.sh
+++ b/comment_on_pr.sh
@@ -39,31 +39,40 @@ has_elements() {
 # If BASE_REPORT is provided, a comparison will be made
 markdown_from_report() {
   cat <<-"EOF"
-		<!-- AUTOGENERATED by nix-flake-outputs-size action -->
+<!-- AUTOGENERATED by nix-flake-outputs-size action -->
 
-		# Flake output sizes
+# Flake output sizes
 
-		**Definitions:**
+<details><summary><b>Definitions:</b></summary>
 
-		- `Name`: the name of the package/configuration.
-		- `Size`: the closure size (size on disk/NAR size + all transitive dependencies).
-		- `NAR Size`: the size of the build output (package without the dependencies).
+- `Name`: the name of the package/configuration.
+- `Size`: the closure size (size on disk/NAR size + all transitive dependencies).
+- `NAR Size`: the size of the build output (package without the dependencies).
 	EOF
   if [ "${2+set}" = "set" ]; then
     cat <<-"EOF"
-			- `[NAR] Size Change`: the amount changed compared to the main branch.
+- `[NAR] Size Change`: the amount changed compared to the main branch.
+
+</details>
+		EOF
+  else
+    cat <<-"EOF"
+</details>
 		EOF
   fi
   cat <<-"EOF"
 
-		**Tips on reading this data:**
+<details><summary><b>Tips on reading this data:</b></summary>
+
+- For NixOS configurations you generally care only about the `Size` (closure size/size on disk).
+  - Reduce the `Size` by disabling unneeded services/default packages.
+- For Packages you care about both the `Size` and the `NAR Size`.
+  - Reduce the `NAR Size` by reducing the size of the build outputs, e.g. don't copy unnecessary data to the $out dir, optimize binaries for size, etc.
+  - Reduce the `Size` by reducing the dependencies (e.g. `buildInputs`).
+  - Don't worry too much about size, some dependencies are deduplicated, e.g. `glibc` adds ~40MiB to the `Size`, but is generally shared by ~every binary on the system, so, chances are, you are already including it from somewhere else and statically linking with e.g. `musl` is not gonna improve things.
+
+</details>
 
-		- For NixOS configurations you generally care only about the `Size` (closure size/size on disk).
-		  - Reduce the `Size` by disabling unneeded services/default packages.
-		- For Packages you care about both the `Size` and the `NAR Size`.
-		  - Reduce the `NAR Size` by reducing the size of the build outputs, e.g. don't copy unnecessary data to the $out dir, optimize binaries for size, etc.
-		  - Reduce the `Size` by reducing the dependencies (e.g. `buildInputs`).
-		  - Don't worry too much about size, some dependencies are deduplicated, e.g. `glibc` adds ~40MiB to the `Size`, but is generally shared by ~every binary on the system, so, chances are, you are already including it from somewhere else and statically linking with e.g. `musl` is not gonna improve things.
 	EOF
 
   if [ "${2+set}" = "set" ]; then
@@ -140,15 +149,15 @@ if [ -z "$COMMENT_ID" ]; then
   log 'Posting new comment'
   curl -o - -X 'POST' \
     "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments" \
-    -H 'accept: application/json' \
+    -H 'Accept: application/json' \
     -H "Authorization: token $GITHUB_TOKEN" \
     -H 'Content-Type: application/json' \
     -d "$data"
 else
   log "Editing comment $COMMENT_ID"
   curl -o - -X 'PATCH' \
-    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments/$COMMENT_ID" \
-    -H 'accept: application/json' \
+    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/comments/$COMMENT_ID" \
+    -H 'Accept: application/json' \
     -H "Authorization: token $GITHUB_TOKEN" \
     -H 'Content-Type: application/json' \
     -d "$data"
diff --git a/retrieve-old-report.sh b/retrieve-old-report.sh
index e7c8de6..14a48db 100755
--- a/retrieve-old-report.sh
+++ b/retrieve-old-report.sh
@@ -5,7 +5,7 @@
 repo_info() {
   curl -X GET \
     -H "Authorization: token $GITHUB_TOKEN" \
-    -H 'accept: application/json' \
+    -H 'Accept: application/json' \
     "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY"
 }
 
@@ -22,7 +22,7 @@ base_report_url() {
   curl -X 'GET' \
     "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/actions/tasks" \
     -H "Authorization: token $GITHUB_TOKEN" \
-    -H 'accept: application/json' |
+    -H 'Accept: application/json' |
     jq --raw-output \
       --arg name "$JOB_NAME" \
       --arg head_branch "$1" \