diff --git a/prev/any.sh b/prev/any.sh
index 62bef44..3710657 100644
--- a/prev/any.sh
+++ b/prev/any.sh
@@ -1,5 +1,5 @@
 if exists exiftool; then
-	exiftool "$f" || true
+	exiftool -- "$f" || true
 else
-	cat "$f"
+	cat < "$f"
 fi
diff --git a/prev/cat.sh b/prev/cat.sh
index 926d339..f58e669 100644
--- a/prev/cat.sh
+++ b/prev/cat.sh
@@ -1 +1 @@
-cat "$f"
+cat < "$f"
diff --git a/prev/jq.sh b/prev/jq.sh
index cd63650..dce679c 100644
--- a/prev/jq.sh
+++ b/prev/jq.sh
@@ -1 +1 @@
-jq -C . "$f"
+jq -C . < "$f"
diff --git a/prev/ls.sh b/prev/ls.sh
index 4681bd1..2ac401d 100644
--- a/prev/ls.sh
+++ b/prev/ls.sh
@@ -1 +1 @@
-ls --color --group-directories-first "$f"
+ls --color --group-directories-first -- "$f"
diff --git a/prev/mdcat.sh b/prev/mdcat.sh
index 665333d..e86f565 100644
--- a/prev/mdcat.sh
+++ b/prev/mdcat.sh
@@ -1 +1 @@
-mdcat --columns "$w" "$f"
+mdcat --columns "$w" -- "$f"
diff --git a/prev/odt.sh b/prev/odt.sh
index a7dbe6b..854b203 100644
--- a/prev/odt.sh
+++ b/prev/odt.sh
@@ -4,11 +4,12 @@ office() {
 	# File produced by libreoffice
 	jpg="$(printf '%s\n' "$f" | sed 's|^.*/||; s|\..*$||')"
 
-	libreoffice               \
-		--headless            \
-		--convert-to jpg "$f" \
-		--outdir "$cache_d" >/dev/null &&
-		mv "$cache_d/$jpg.jpg" "$cache_f"
+	libreoffice             \
+		--headless          \
+		--convert-to jpg    \
+		--outdir "$cache_d" \
+		"$f" >/dev/null &&
+		mv -- "$cache_d/$jpg.jpg" "$cache_f"
 }
 
 convert_and_show_image office
diff --git a/prev/source_highlight.sh b/prev/source_highlight.sh
index 7dfb8a5..57b0a1e 100644
--- a/prev/source_highlight.sh
+++ b/prev/source_highlight.sh
@@ -1,3 +1,4 @@
-source-highlight \
-	--tab=4 --out-format=esc \
-	--style=esc256.style --failsafe -i "$f"
+source-highlight                       \
+	--tab=4 --out-format=esc           \
+	--style=esc256.style --failsafe -i \
+	-- "$f"