diff --git a/lua-libraries/README.tinyyaml b/lua-libraries/README.tinyyaml
index 9af1448..ea1f681 100644
--- a/lua-libraries/README.tinyyaml
+++ b/lua-libraries/README.tinyyaml
@@ -18,3 +18,5 @@ RESILIENT was to avoid a C binding dependency, since style files are
 reasonably small theoretically (so performance do not really matter) and
 only need a subset of YAML (so a pure-Lua implementation, even possibly
 incomplete, ought to be sufficient.)
+
+Modications are marked with comments MODIFIED RESILIENT
diff --git a/lua-libraries/resilient-tinyyaml.lua b/lua-libraries/resilient-tinyyaml.lua
index 85bec40..10cd45e 100644
--- a/lua-libraries/resilient-tinyyaml.lua
+++ b/lua-libraries/resilient-tinyyaml.lua
@@ -107,7 +107,7 @@ function types.timestamp:__init(y, m, d, h, i, s, f, z)
   self.minute = tonumber(i or 0)
   self.second = tonumber(s or 0)
   if type(f) == 'string' and sfind(f, '^%d+$') then
-    self.fraction = tonumber(f) * math.pow(10, 3 - #f)
+    self.fraction = tonumber(f) * 10^(3 - #f) -- MODIFIED RESILIENT Lua min compat
   elseif f then
     self.fraction = f
   else
diff --git a/packages/resilient/bookmatters/init.lua b/packages/resilient/bookmatters/init.lua
index c6d098b..126002a 100644
--- a/packages/resilient/bookmatters/init.lua
+++ b/packages/resilient/bookmatters/init.lua
@@ -77,7 +77,11 @@ end
 
 -- Source: https://www.nbdtech.com/Blog/archive/2008/04/27/Calculating-the-Perceived-Brightness-of-a-Color.aspx
 local function weightedColorDistanceIn3D (color)
-  return math.sqrt(math.pow(color.r * 255, 2) * 0.241 + math.pow(color.g * 255, 2) * 0.691 + math.pow(color.b * 255, 2) * 0.068)
+  return math.sqrt(
+    (color.r * 255)^2 * 0.241 
+    + (color.g * 255)^2 * 0.691 
+    + (color.b * 255)^2 * 0.068
+  )
 end
 local function contrastColor(color)
   if not color.r then
@@ -160,7 +164,6 @@ function package:registerCommands ()
     end
 
     if metadata["meta:isbn"] then
-      -- local H = SILE.measurement("100%fh"):tonumber() - SILE.measurement("40mm"):tonumber()
       SILE.call("skip", { height = offset })
       SILE.call("kern", { width = SILE.nodefactory.hfillglue() })
       SILE.call("framebox", { fillcolor = "white", padding = pad1, borderwidth = 0 }, {
diff --git a/packages/resilient/poetry/init.lua b/packages/resilient/poetry/init.lua
index a44baf8..8cf96b2 100644
--- a/packages/resilient/poetry/init.lua
+++ b/packages/resilient/poetry/init.lua
@@ -5,6 +5,7 @@
 --
 local ast = require("silex.ast")
 local createStructuredCommand = ast.createStructuredCommand
+local LOG10 = math.log(10)
 
 local base = require("packages.resilient.base")
 
@@ -178,7 +179,8 @@ function package:registerCommands ()
         digitSize = SILE.shaper:measureChar("0").width
       end)
       local setback = SILE.length("1.75em"):absolute()
-      indent = SILE.length((math.floor(math.log10(nVerse + iVerse)) + 1) * digitSize):absolute()
+      local logv = math.floor(math.log(nVerse + iVerse) / LOG10) -- Reminder: math.log10 is not in Lua "min" profiile
+      indent = SILE.length((logv + 1) * digitSize):absolute()
         + setback
         + SILE.length(SILE.settings:get("document.parindent")):absolute()
     end