diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d87f7e6..570ea849 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+# Unreleased
+
+## Deprecations
+
+* Uses of `--sw-opti`, and `--respect-prop-shadow` are now hard errors.
+* `-F` has been removed completely. It was deprecated before the picom fork.
+
 # v11-rc1 (2024-Jan-14)
 
 ## Notable features
diff --git a/man/picom.1.asciidoc b/man/picom.1.asciidoc
index dbd3ec69..b5df2a78 100644
--- a/man/picom.1.asciidoc
+++ b/man/picom.1.asciidoc
@@ -49,9 +49,6 @@ OPTIONS
 *-f*, *--fading*::
 	Fade windows in/out when opening/closing and when opacity changes, unless *--no-fading-openclose* is used.
 
-*-F*::
-	Equals to *-f*. Deprecated.
-
 *-i*, *--inactive-opacity*='OPACITY'::
 	Opacity of inactive windows. (0.1 - 1.0, defaults to 1.0)
 
diff --git a/src/config_libconfig.c b/src/config_libconfig.c
index ed2097eb..4dc15a1f 100644
--- a/src/config_libconfig.c
+++ b/src/config_libconfig.c
@@ -478,7 +478,8 @@ char *parse_config_libconfig(options_t *opt, const char *config_file, bool *shad
 	}
 	// --sw-opti
 	if (lcfg_lookup_bool(&cfg, "sw-opti", &bval)) {
-		log_warn("The sw-opti %s", deprecation_message);
+		log_error("The sw-opti %s", deprecation_message);
+		goto err;
 	}
 	// --use-ewmh-active-win
 	lcfg_lookup_bool(&cfg, "use-ewmh-active-win", &opt->use_ewmh_active_win);
diff --git a/src/options.c b/src/options.c
index 834b66f0..36378568 100644
--- a/src/options.c
+++ b/src/options.c
@@ -306,7 +306,7 @@ static void usage(const char *argv0, int ret) {
 	}
 }
 
-static const char *shortopts = "D:I:O:r:o:m:l:t:i:e:hscnfFCazGb";
+static const char *shortopts = "D:I:O:r:o:m:l:t:i:e:hscnfCazGb";
 
 /// Get config options that are needed to parse the rest of the options
 /// Return true if we should quit
@@ -426,7 +426,6 @@ bool get_cfg(options_t *opt, int argc, char *const *argv, bool shadow_enable,
 			opt->wintype_option[WINTYPE_DROPDOWN_MENU].opacity = tmp;
 			break;
 		case 'f':
-		case 'F':
 			fading_enable = true;
 			break;
 		P_CASEINT('r', shadow_radius);
@@ -511,8 +510,9 @@ bool get_cfg(options_t *opt, int argc, char *const *argv, bool shadow_enable,
 			         "--crop-shadow-to-monitor instead.");
 			break;
 		case 274:
-			log_warn("--sw-opti has been deprecated, please remove it from the "
+			log_error("--sw-opti has been deprecated, please remove it from the "
 			         "command line options");
+			failed = true;
 			break;
 		case 275:
 			// --vsync-aggressive
@@ -523,9 +523,10 @@ bool get_cfg(options_t *opt, int argc, char *const *argv, bool shadow_enable,
 		P_CASEBOOL(276, use_ewmh_active_win);
 		case 277:
 			// --respect-prop-shadow
-			log_warn("--respect-prop-shadow option has been deprecated, its "
+			log_error("--respect-prop-shadow option has been deprecated, its "
 			         "functionality will always be enabled. Please remove it "
 			         "from the command line options");
+			failed = true;
 			break;
 		P_CASEBOOL(278, unredir_if_possible);
 		case 279: