diff --git a/xlsx.flow.js b/xlsx.flow.js
index 5dd0e1c..69bc77a 100644
--- a/xlsx.flow.js
+++ b/xlsx.flow.js
@@ -19184,7 +19184,12 @@ function parse_dom_table(table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
 				}
 			}
 			if (cInRange.indexOf(C) !== -1) {
-				C = Math.max.apply(null, cInRange) + 1;
+				for (let i = 0; i < cInRange.length; i++) {
+					C += 1;
+					if (cInRange.indexOf(C) === -1) {
+						break;
+					}
+				}
 			}
 			/* TODO: figure out how to extract nonstandard mso- style */
 			CS = +elt.colSpan || 1;
diff --git a/xlsx.js b/xlsx.js
index 0344342..08f1345 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -19068,7 +19068,12 @@ function parse_dom_table(table, _opts) {
 				}
 			}
 			if (cInRange.indexOf(C) !== -1) {
-				C = Math.max.apply(null, cInRange) + 1;
+				for (let i = 0; i < cInRange.length; i++) {
+					C += 1;
+					if (cInRange.indexOf(C) === -1) {
+						break;
+					}
+				}
 			}
 			/* TODO: figure out how to extract nonstandard mso- style */
 			CS = +elt.colSpan || 1;
diff --git a/xlsx.mini.flow.js b/xlsx.mini.flow.js
index b8f9bad..c836af7 100644
--- a/xlsx.mini.flow.js
+++ b/xlsx.mini.flow.js
@@ -7403,7 +7403,12 @@ function parse_dom_table(table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
 				}
 			}
 			if (cInRange.indexOf(C) !== -1) {
-				C = Math.max.apply(null, cInRange) + 1;
+				for (let i = 0; i < cInRange.length; i++) {
+					C += 1;
+					if (cInRange.indexOf(C) === -1) {
+						break;
+					}
+				}
 			}
 			/* TODO: figure out how to extract nonstandard mso- style */
 			CS = +elt.colSpan || 1;
diff --git a/xlsx.mini.js b/xlsx.mini.js
index 5389244..c1f9342 100644
--- a/xlsx.mini.js
+++ b/xlsx.mini.js
@@ -7312,7 +7312,12 @@ function parse_dom_table(table, _opts) {
 				}
 			}
 			if (cInRange.indexOf(C) !== -1) {
-				C = Math.max.apply(null, cInRange) + 1;
+				for (let i = 0; i < cInRange.length; i++) {
+					C += 1;
+					if (cInRange.indexOf(C) === -1) {
+						break;
+					}
+				}
 			}
 			/* TODO: figure out how to extract nonstandard mso- style */
 			CS = +elt.colSpan || 1;