diff --git a/Makefile b/Makefile
index e0a601d..0822ddc 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ include config.mk
 # flags for compiling
 DWLCPPFLAGS = -I. -DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XWAYLAND)
 DWLDEVCFLAGS = -g -pedantic -Wall -Wextra -Wdeclaration-after-statement -Wno-unused-parameter -Wshadow -Wunused-macros\
-	-Werror=strict-prototypes -Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types
+	-Werror=strict-prototypes -Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types -Wfloat-conversion
 
 # CFLAGS / LDFLAGS
 PKGS      = wlroots wayland-server xkbcommon libinput $(XLIBS)
diff --git a/config.def.h b/config.def.h
index a8ed61d..9009517 100644
--- a/config.def.h
+++ b/config.def.h
@@ -12,7 +12,7 @@ static const float bordercolor[]           = COLOR(0x444444ff);
 static const float focuscolor[]            = COLOR(0x005577ff);
 static const float urgentcolor[]           = COLOR(0xff0000ff);
 /* To conform the xdg-protocol, set the alpha to zero to restore the old behavior */
-static const float fullscreen_bg[]         = {0.1, 0.1, 0.1, 1.0}; /* You can also use glsl colors */
+static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
 
 /* tagging - TAGCOUNT must be no greater than 31 */
 #define TAGCOUNT (9)
@@ -39,12 +39,12 @@ static const Layout layouts[] = {
 /* monitors */
 /* NOTE: ALWAYS add a fallback rule, even if you are completely sure it won't be used */
 static const MonitorRule monrules[] = {
-	/* name       mfact nmaster scale layout       rotate/reflect                x    y */
+	/* name       mfact  nmaster scale layout       rotate/reflect                x    y */
 	/* example of a HiDPI laptop monitor:
-	{ "eDP-1",    0.5,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
+	{ "eDP-1",    0.5f,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
 	*/
 	/* defaults */
-	{ NULL,       0.55, 1,      1,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
+	{ NULL,       0.55f, 1,      1,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
 };
 
 /* keyboard */
@@ -126,8 +126,8 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_k,          focusstack,     {.i = -1} },
 	{ MODKEY,                    XKB_KEY_i,          incnmaster,     {.i = +1} },
 	{ MODKEY,                    XKB_KEY_d,          incnmaster,     {.i = -1} },
-	{ MODKEY,                    XKB_KEY_h,          setmfact,       {.f = -0.05} },
-	{ MODKEY,                    XKB_KEY_l,          setmfact,       {.f = +0.05} },
+	{ MODKEY,                    XKB_KEY_h,          setmfact,       {.f = -0.05f} },
+	{ MODKEY,                    XKB_KEY_l,          setmfact,       {.f = +0.05f} },
 	{ MODKEY,                    XKB_KEY_Return,     zoom,           {0} },
 	{ MODKEY,                    XKB_KEY_Tab,        view,           {0} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_C,          killclient,     {0} },
diff --git a/dwl.c b/dwl.c
index 77583ee..449913d 100644
--- a/dwl.c
+++ b/dwl.c
@@ -65,6 +65,7 @@
 /* macros */
 #define MAX(A, B)               ((A) > (B) ? (A) : (B))
 #define MIN(A, B)               ((A) < (B) ? (A) : (B))
+#define ROUND(X)                ((int)((X < 0) ? (X - 0.5) : (X + 0.5)))
 #define CLEANMASK(mask)         (mask & ~WLR_MODIFIER_CAPS)
 #define VISIBLEON(C, M)         ((M) && (C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))
 #define LENGTH(X)               (sizeof X / sizeof X[0])
@@ -196,7 +197,7 @@ struct Monitor {
 	unsigned int seltags;
 	unsigned int sellt;
 	uint32_t tagset[2];
-	double mfact;
+	float mfact;
 	int gamma_lut_changed;
 	int nmaster;
 	char ltsymbol[16];
@@ -1621,17 +1622,17 @@ motionnotify(uint32_t time)
 	}
 
 	/* Update drag icon's position */
-	wlr_scene_node_set_position(&drag_icon->node, cursor->x, cursor->y);
+	wlr_scene_node_set_position(&drag_icon->node, ROUND(cursor->x), ROUND(cursor->y));
 
 	/* If we are currently grabbing the mouse, handle and return */
 	if (cursor_mode == CurMove) {
 		/* Move the grabbed client to the new position. */
-		resize(grabc, (struct wlr_box){.x = cursor->x - grabcx, .y = cursor->y - grabcy,
+		resize(grabc, (struct wlr_box){.x = ROUND(cursor->x) - grabcx, .y = ROUND(cursor->y) - grabcy,
 			.width = grabc->geom.width, .height = grabc->geom.height}, 1);
 		return;
 	} else if (cursor_mode == CurResize) {
 		resize(grabc, (struct wlr_box){.x = grabc->geom.x, .y = grabc->geom.y,
-			.width = cursor->x - grabc->geom.x, .height = cursor->y - grabc->geom.y}, 1);
+			.width = ROUND(cursor->x) - grabc->geom.x, .height = ROUND(cursor->y) - grabc->geom.y}, 1);
 		return;
 	}
 
@@ -1683,8 +1684,8 @@ moveresize(const Arg *arg)
 	setfloating(grabc, 1);
 	switch (cursor_mode = arg->ui) {
 	case CurMove:
-		grabcx = cursor->x - grabc->geom.x;
-		grabcy = cursor->y - grabc->geom.y;
+		grabcx = ROUND(cursor->x) - grabc->geom.x;
+		grabcy = ROUND(cursor->y) - grabc->geom.y;
 		wlr_cursor_set_xcursor(cursor, cursor_mgr, "fleur");
 		break;
 	case CurResize:
@@ -2105,7 +2106,7 @@ setmfact(const Arg *arg)
 
 	if (!arg || !selmon || !selmon->lt[selmon->sellt]->arrange)
 		return;
-	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
+	f = arg->f < 1.0f ? arg->f + selmon->mfact : arg->f - 1.0f;
 	if (f < 0.1 || f > 0.9)
 		return;
 	selmon->mfact = f;
@@ -2277,7 +2278,7 @@ setup(void)
 	wl_signal_add(&session_lock_mgr->events.new_lock, &lock_listener);
 	LISTEN_STATIC(&session_lock_mgr->events.destroy, destroysessionmgr);
 	locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height,
-			(float [4]){0.1, 0.1, 0.1, 1.0});
+			(float [4]){0.1f, 0.1f, 0.1f, 1.0f});
 	wlr_scene_node_set_enabled(&locked_bg->node, 0);
 
 	/* Use decoration protocols to negotiate server-side decorations */
@@ -2466,7 +2467,7 @@ tile(Monitor *m)
 		return;
 
 	if (n > m->nmaster)
-		mw = m->nmaster ? m->w.width * m->mfact : 0;
+		mw = m->nmaster ? ROUND(m->w.width * m->mfact) : 0;
 	else
 		mw = m->w.width;
 	i = my = ty = 0;