diff --git a/amaranth_boards/icesugar_pro.py b/amaranth_boards/icesugar_pro.py
new file mode 100644
index 00000000..88131182
--- /dev/null
+++ b/amaranth_boards/icesugar_pro.py
@@ -0,0 +1,150 @@
+# iCESugar-pro Platform
+# See: https://github.com/wuxx/icesugar-pro
+
+import subprocess
+
+from amaranth.build import *
+from amaranth.vendor.lattice_ecp5 import *
+from amaranth_boards.resources import *
+
+__all__ = ["ICESugarProPlatform"]
+
+
+class ICESugarProPlatform(LatticeECP5Platform):
+    name = "IceSugar Pro v1.3"
+    device  = "LFE5U-25F"
+    package = "BG256"
+    speed   = "6"
+    default_clk = "clk25"
+
+    resources = [
+        Resource("clk25", 0, Pins("P6", dir="i"), 
+                 Clock(25e6), Attrs(IO_TYPE="LVCMOS33")),
+        
+        RGBLEDResource(0, r="B11", g="A11", b="A12", attrs=Attrs(IO_TYPE="LVCMOS33")),
+
+        UARTResource(0, rx="A9", tx="N4",
+            attrs=Attrs(IO_TYPE="LVCMOS33", PULLUP=1)
+        ),
+    ]
+
+    # https://github.com/wuxx/icesugar-pro/tree/master/schematic
+    connectors = [
+        Connector("io", 0, {
+            "41:": "A8",
+            "42:": "P11",
+            "44:": "P12",
+            "46:": "N12",
+            "48:": "P13",
+            "49:": "B8",
+            "50:": "N13",
+            "51:": "A7",
+            "52:": "P14",
+            "54:": "M12",
+            "57:": "B7",
+            "58:": "M13",
+            "59:": "A6",
+            "60:": "L14",
+            "61:": "B6",
+            "62:": "L13",
+            "63:": "A5",
+            "64:": "K14",
+            "65:": "B5",
+            "66:": "K13",
+            "67:": "A4",
+            "68:": "J14",
+            "69:": "B4",
+            "70:": "J13",
+            "71:": "A3",
+            "72:": "H14",
+            "73:": "B3",
+            "74:": "H13",
+            "75:": "A2",
+            "76:": "G14",
+            "77:": "B1",
+            "78:": "G13",
+            "79:": "B2",
+            "80:": "F14",
+            "81:": "C1",
+            "82:": "F13",
+            "83:": "C2",
+            "84:": "E14",
+            "85:": "D1",
+            "86:": "E13",
+            "87:": "D3",
+            "88:": "E12",
+            "89:": "E1",
+            "90:": "C13",
+            "91:": "E2",
+            "92:": "D13",
+            "93:": "F1",
+            "94:": "C12",
+            "95:": "F2",
+            "96:": "D12",
+            "97:": "G1",
+            "98:": "C11",
+            "99:": "G2",
+            "100:": "D11",
+            "101:": "H2",
+            "102:": "C10",
+            "103:": "J1",
+            "104:": "D10",
+            "109:": "J2",
+            "110:": "C9",
+            "111:": "K1",
+            "112:": "D9",
+            "113:": "K2",
+            "114:": "C8",
+            "115:": "L1",
+            "116:": "D8",
+            "117:": "L2",
+            "118:": "C7",
+            "119:": "M1",
+            "120:": "D7",
+            "121:": "M2",
+            "122:": "C6",
+            "123:": "N1",
+            "124:": "D6",
+            "125:": "N3",
+            "126:": "C5",
+            "127:": "P1",
+            "128:": "D5",
+            "129:": "P2",
+            "130:": "C4",
+            "131:": "R1",
+            "132:": "D4",
+            "133:": "R2",
+            "134:": "C3",
+            "135:": "T2",
+            "136:": "E4",
+            "137:": "R3",
+            "138:": "E3",
+            "139:": "T3",
+            "140:": "F4",
+            "141:": "R4",
+            "142:": "F3",
+            "143:": "T4",
+            "144:": "G4",
+            "145:": "R5",
+            "146:": "G3",
+            "147:": "R6",
+            "148:": "H3",
+            "149:": "T6",
+            "150:": "J4",
+            "151:": "P7",
+            "152:": "J3",
+            "153:": "R7",
+            "154:": "K4",
+            "155:": "R8",
+            "156:": "K3",
+        })
+    ]
+
+    def toolchain_program(self, products, name):
+        with products.extract("{}.bit".format(name)) as bitstream_filename:
+            subprocess.check_call(["icesprog", bitstream_filename])
+
+
+if __name__ == "__main__":
+    from amaranth_boards.test.blinky import *
+    ICESugarProPlatform().build(Blinky(), do_program=True)
diff --git a/setup.py b/setup.py
index 724e5c43..a8277f7c 100644
--- a/setup.py
+++ b/setup.py
@@ -23,6 +23,7 @@ def local_scheme(version):
     install_requires=[
         "amaranth>=0.2,<0.5",
         "importlib_metadata; python_version<'3.8'",
+        "markupsafe==2.0.1",
     ],
     packages=find_packages(),
     project_urls={