diff --git a/src/math/const.go b/src/math/const.go
index 20b70653b4..0fc8715dd0 100644
--- a/src/math/const.go
+++ b/src/math/const.go
@@ -9,18 +9,18 @@ package math
 
 // Mathematical constants.
 const (
-	E   = 2.71828182845904523536028747135266249775724709369995957496696763 // http://oeis.org/A001113
-	Pi  = 3.14159265358979323846264338327950288419716939937510582097494459 // http://oeis.org/A000796
-	Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // http://oeis.org/A001622
+	E   = 2.71828182845904523536028747135266249775724709369995957496696763 // https://oeis.org/A001113
+	Pi  = 3.14159265358979323846264338327950288419716939937510582097494459 // https://oeis.org/A000796
+	Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // https://oeis.org/A001622
 
-	Sqrt2   = 1.41421356237309504880168872420969807856967187537694807317667974 // http://oeis.org/A002193
-	SqrtE   = 1.64872127070012814684865078781416357165377610071014801157507931 // http://oeis.org/A019774
-	SqrtPi  = 1.77245385090551602729816748334114518279754945612238712821380779 // http://oeis.org/A002161
-	SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // http://oeis.org/A139339
+	Sqrt2   = 1.41421356237309504880168872420969807856967187537694807317667974 // https://oeis.org/A002193
+	SqrtE   = 1.64872127070012814684865078781416357165377610071014801157507931 // https://oeis.org/A019774
+	SqrtPi  = 1.77245385090551602729816748334114518279754945612238712821380779 // https://oeis.org/A002161
+	SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // https://oeis.org/A139339
 
-	Ln2    = 0.693147180559945309417232121458176568075500134360255254120680009 // http://oeis.org/A002162
+	Ln2    = 0.693147180559945309417232121458176568075500134360255254120680009 // https://oeis.org/A002162
 	Log2E  = 1 / Ln2
-	Ln10   = 2.30258509299404568401799145468436420760110148862877297603332790 // http://oeis.org/A002392
+	Ln10   = 2.30258509299404568401799145468436420760110148862877297603332790 // https://oeis.org/A002392
 	Log10E = 1 / Ln10
 )